Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8331c38078b8b0…

MALICIOUS

PDF

81.1 KB Created: 2021-09-19 09:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: dc618e6566c8bd3fc31592c5a3c995bc SHA-1: d1bbe7d6df7662e6e895255b16bd2dbdf7c0767a SHA-256: aa8331c38078b8b0c05aa6518fd65d6df9812e3dd97849ae0e492625751497a4
146 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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) or Microsoft license-boilerplate 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://living-stone.lu/userfiles/files/5988849512.pdf In PDF document text
    • http://w-mill.jp/images/file/wiwexamovudivelexifigure.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/65211312328.pdfIn PDF document text
    • http://gamaxmotor.cz/data/dokumenty/70708856910.pdfIn PDF document text
    • http://zzquansu.cn/d/files/fexoxegotasuxipibejo.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210906005034_m61g1x.pdfIn PDF document text
    • http://amicissiapiemonteisa.it/userfiles/files/33557180380.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/safitajamisib.pdfIn PDF document text
    • https://lbk-ingatlan.hu/uploads/file/lozapusodenijewixolapef.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/dowemumedozirimudewipo.pdfIn PDF document text
    • https://activepymes.com/pub/file/sipulexukazareb.pdfIn PDF document text
    • http://xn--4k0b43gkwo4gn.com/upload/editor/file/tunufiminisubav.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/jodan.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/gunidaxuvatefume.pdfIn PDF document text
    • http://qdjshg.com/files/file/sasenivawefuzirofezerora.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/ruvonixokobupikanobo.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/donazasad.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/65100501843.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/37844296795.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/mebojutezigikogurusuzivug.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/4224531015.pdfIn PDF document text
    • http://joyandwowbook.com/upload/file/93086360542.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/52483154178.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=childaspectratio+gridview+flutterPDF 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_off0000d510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD510 18148 bytes
SHA-256: 6507e413cfd6d1af77651af925410279f5e832085b30542978e4aadd0299ecdc
font_01_sfnt_off000104d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D8 11080 bytes
SHA-256: 0c84548ddad92de4bf3d8e4eb6469d8caec71cac98311f6a1f851f5e6b3a7d3a
font_02_sfnt_off00011eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1