Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce2dc5f5f7a5dda…

MALICIOUS

PDF

92.3 KB Created: 2021-09-02 12:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a3e9a8baa0c333139dc3f6430a02fc84 SHA-1: 425abf536ccd28567eab7684c3afadb34e32056e SHA-256: 2ce2dc5f5f7a5ddacf5e1a42e562cfd393ff81393fb48d143c10ba4cff7fbaf1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as 'Pdf.Phishing.Trojan'. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the nature of the links and the detection name imply malicious intent, likely involving user interaction to visit these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 6

  • 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.
  • 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://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607074367c8ff---57705648235.pdf In PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/86627881300.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b2544825668---ridubitofiwolesosoriva.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/12149743419.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/38366453568.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/hagil8r28ht4icis1arsh24lqr/tigufixexojop.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/0136a8c6aa6fa8a2f0a78cd74fd0bc32/rotetubikawirewazirevati.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/788cdfee055aeb33ac5d7c4802edfdb5/najosudezamisenamukimijo.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719a32649e1---megarugo.pdfIn PDF document text
    • https://hagepoorter.be/files/files/nonewepuzufitinakefamoxax.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161233f938920a---35606410013.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/o2je6qvlevgjc70vm66n3vic3s/17430675712.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/41629406875.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/78492389266.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/kefemesabazevakesusif.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/59742478360.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/8941294308.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/basune.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/48581589658.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/i0pmvocan949monqbrqemc2fcp/gepatonabovube.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/7f5c396c9ce6e71eca909f20da86d7db/vuropokobugomokedizi.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c5f3e10ce---wodumo.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/11092750655.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9d3553142---38721258253.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161244a3a28a60---zuxokodawip.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/69484593912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=effect+of+rural+urban+migration+on+agriculture+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10139 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11950 11016 bytes
SHA-256: 06baad18d3574f7e3b720529249d94d8b75e927e411461b898eee38045b7e4dc
font_02_sfnt_off0001326b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326B 18508 bytes
SHA-256: 8ecaa5b48d0e8a99c8f7f5e0d5ed6560c722f056fa80b706c70f5ef568d0e94a

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