Malicious PDF — malware analysis report

Static analysis result for SHA-256 1254e0e93330d73e…

MALICIOUS

PDF

80.4 KB Created: 2021-10-15 01:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8984de483f3b9ae0e660ff746d6536ed SHA-1: b407dba6646fa80c70426ca06b1ab69ba7d3ee9a SHA-256: 1254e0e93330d73e9742b750aa057edc97b8610be6be965b820a2051941312d4
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it contains a high number of external links, some pointing to disposable hosting, and a callback lure suggesting a phishing or tech-support scam. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent to redirect users or solicit fraudulent calls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/0e1c902d18ee384b94f0709f9293de3f/busipupudoliromo.pdf In PDF document text
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/nonujefadofaj.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/18511098487.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/28975944435.pdfIn PDF document text
    • http://cutyoursupport.com/userfiles/file/37708614420.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/lizumujalagorodudun.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/66662105717.pdfIn PDF document text
    • http://solee.cn/ckfinder/userfiles/files/tedolivipipoxu.pdfIn PDF document text
    • https://trexanh.net/upload/files/xazarug.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/15218586836.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1615bc0ca4ea02---7535170268.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/xererovojagoxasolavarize.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/37201632809.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/fozotom.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/77219011938.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/vizanasuvofexel.pdfIn PDF document text
    • http://transportdiverse.com/uploads/files/4692917756.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/66269721266.pdfIn PDF document text
    • http://ranczowdolinie.com/files/pizobubebaziwaf.pdfIn PDF document text
    • https://ontogepszerviz.hu/editor_up/sebogufejoremekap.pdfIn PDF document text
    • http://zl369.net/userfiles/file/70487474892.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/RhDyTiV0TgQ/uplcv?utm_term=christmas+treasure+hunt+clues+for+adultsPDF 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_off0000d7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E0 16560 bytes
SHA-256: 699344671bd82bc12d8a95a6b2705f37be963f577466447d404c13d403dc6884
font_01_sfnt_off000102a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A9 10872 bytes
SHA-256: d83d9ab08dc572bd16a34eaa0f9ad9df5c11c495ee5895dddec22f0a1255b1fc
font_02_sfnt_off00011b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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