Malicious PDF — malware analysis report

Static analysis result for SHA-256 94cdc3a45abb2d67…

MALICIOUS

PDF

79.3 KB Created: 2021-07-13 23:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e5e1f34f1694b010337a0837056bc39f SHA-1: 2a64b0bae9fcd275ab91fb7ce904211e8616a865 SHA-256: 94cdc3a45abb2d6700e616beda96cb21b05a9638ec3c545a0422cf972e125e4c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URLs, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_CALLBACK_LURE' further suggests a callback phishing or tech-support scam pattern, aiming to trick users into interacting with malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ketchas.ru/uplcv?utm_term=pulsafeeder+microvision+manual PDF link annotation
    • https://mabuksusu.com/contents//files/53788598505.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/02866e28807b9b0253f01ebfa78cff3f/jotuvifib.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/jimusudopizewutabixibigaf.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/nogugetilewobepawe.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/repekezadeg.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/judibebol.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099a30e7f742---lovopomebi.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/1bcf447b288098383c1edc1fe87ea778/14516266617.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/d5617db634a9ad57d48a88a2b0291c1d/wejemorofebirosek.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/fejesiw.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/454978237.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a05663dc110---69509495950.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/c6f2e5a657d07c262330d7bd4b7db392/9294590920.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/82822820991.pdfIn PDF document text
    • http://airsoft1.ro/files/file/judubenaxazoji.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/setalumu.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cc3f620b6ab---5844878749.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/sopibezosajuvilo.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/kefixabekobu.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1626097011.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca33c3c725---73247901215.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/41461834158.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093b0035a554---11867627307.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_off0000d32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB41 10704 bytes
SHA-256: a5b983d1a26e85f110f07f061e4ad18f77645bf6b72c8403fe2fa67404def24d
font_02_sfnt_off000103d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D0 16948 bytes
SHA-256: a8c7531642d5b021ef8b8e75d611fa760649d7481bc7909b438518a51ef76129

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