Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af609487d813163…

MALICIOUS

PDF

101.6 KB Created: 2021-07-02 01:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d9a2ce823dc0bad26228d1c604551280 SHA-1: 8d4ced22e54ce09b7e3a23b45a1aac0735292680 SHA-256: 2af609487d8131635cec9c603d69086d01ab0d213f3431164217ada1e570caa5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the link farm and the compromised hosting URLs point towards a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9309

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://lhjmfamily.com/clients/5/5d/5d8645f74963a96e1aea25f3b610eff6/File/32636053225.pdf In PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/97328493b2c0a7663adaef04a836f8b7/56095891698.pdfIn PDF document text
    • https://pellevah.com/upload/files/49455777105.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/3661615071.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a317fd4271b---dujusugumonafibolenoga.pdfIn PDF document text
    • http://yuha.be/_files/file/86226720940.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/176a10f8b4ae1636e6b1228ac4db5165/figufita.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d67c9605c---15580708185.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/0io340r933019p672k93bviicu/napanasunadijomiwisumim.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/c5090f3ca8d9c589e002132a490deff8/17108132689.pdfIn PDF document text
    • http://apvn.info/userfiles/file/tamalubuxejefajer.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ioinq371gr0fe3l15rvs2sbsp9/68386656739.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/tlb7asjirqt5iu73gbb5jjca9e/82658865148.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/77e71aeac7318ef0d448b6fcc828e083/sutavo.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/muatu928tbulgh88nrllj8hv2a/tisarozabetujixujorawumuv.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/tinigitibawuti.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/ebcc544f6911bcfadf78e7170e5d143a/wuderas.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/85747518584.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16089be658c4fa---mewomotazobolepu.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/pabenusarisegonipisi.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/6a61029706c57158ed85330673139534/66227323357.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8243ce151c---sipabego.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/feb26b085e3eb4186ad4c2d3b66dec7c/93887329561.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/19559349472.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/nugafabaxesurudev.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/68f7c85f8b3ca98349e29c64ba138e8f/zefotot.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/60409715746.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=paragon+of+virtue+meaningPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 10508 bytes
SHA-256: b6cf875faacbaec028894dfd3ad6187c25d96a133b9601020f3346c878779ab8
font_01_sfnt_off000117a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A1 19860 bytes
SHA-256: 4861df5ff14181643a53f0408088f7701a4a0f646b557987459481349b638542
font_02_sfnt_off00014be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BE9 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
font_03_sfnt_off000160f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160F3 3384 bytes
SHA-256: c1a1762b2d24c83c759ebb8b6c02f286356f83e8c2d1b5bee54b73791132eee4
font_04_sfnt_off00016e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1