Malicious PDF — malware analysis report

Static analysis result for SHA-256 464d0f16ec5fca39…

MALICIOUS

PDF

67.5 KB Created: 2021-09-26 07:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: d67a973cd31e34fa6c9ef2adbd971124 SHA-1: edae7f87221d2fb22c6fc3d3cf6b878d23fe0b6e SHA-256: 464d0f16ec5fca399f361df0d0eeb5b6319d6d1bcecefeb64afb3eac7483c736
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, being image-heavy with a clickable action trigger. It contains numerous embedded URLs pointing to various websites, many of which appear to be compromised CMS uploads, suggesting an attempt to redirect users to malicious content or download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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 https://huntic.ru/uplcv?utm_term=blender+games+on+android PDF link annotation
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/1c76fq7hkumoimkf9og47vrluj/17838928360.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/hbepekudso7qga71p6rem2q1i5/31051814978.pdfIn PDF document text
    • https://agrando.cz/files/file/43182783198.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cd0adaa1f7---pepevodemidofesuguna.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/mibenabimi.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614cc0bb731bc---sawapogikof.pdfIn PDF document text
    • https://www.canoe.ro/Extras/ckfinder/userfiles/files/55068999626.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/42257453268.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/fawuxuzoz.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/6131067211.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/43721192847.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/c42fbdb70470055e65d14244e936c59f/64628282703.pdfIn PDF document text
    • http://ghefootmassage.com/fckeditor_userfiles/file/38561545122.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/10914051007.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/sifowiwuxubadux.pdfIn PDF document text
    • https://egc.ecrom.work/syo/files/nuzavuxonolefopoxijara.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/pk7j9ghphrab11vtl4c8m3m937/lezefapez.pdfIn PDF document text
    • http://seto.cz/uploads/vofajitezozovogas.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/dixizojonizusesabetibasa.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/xopawiwofujinupivutobeg.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/66903795200.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABBC 14500 bytes
SHA-256: e5bb0f103a3f3678ee40dfc714c8e4163e86449b79b5081ede7569625bbf1f8d
font_01_sfnt_off0000cfa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA2 10548 bytes
SHA-256: f1feac87a80eadd8abc3e140d499633b9125d5cc95c57cee55ecd46849d89de4
font_02_sfnt_off0000e765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE765 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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