Malicious PDF — malware analysis report

Static analysis result for SHA-256 4affdd88128e3db5…

MALICIOUS

PDF

80.1 KB Created: 2021-02-22 01:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 37450e9f671476effc2f6a2caf40164e SHA-1: 13e5e1f20cb4e33be29171a88e80f42d73478f50 SHA-256: 4affdd88128e3db50f40b1ad38ce26596335c912a0afd349a8dd63cfd6eec580
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector link farm and a phishing trojan. The document body, though heavily obfuscated, contains text related to graphic designer charges, suggesting a lure to attract users to click on the numerous embedded links. These links point to various domains, many of which are hosted on disposable or suspicious platforms, indicating a coordinated effort to distribute malicious content or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://crophysi.ru/123?utm_term=how+much+do+graphic+designers+charge+for+business+cards In PDF document text
    • http://zebrait.fun/uv-5r_chirp_programmingbzyap.pdfIn PDF document text
    • https://lexugorubu.weebly.com/uploads/1/3/0/7/130776619/817b2f21a46e.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/sijawodowupewepisijo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409256/normal_6003992271469.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/c3ja1gd/xekabijiferoxexerudurodi.pdfIn PDF document text
    • http://omerkatanalp.com/duxadujajisukenuzefestxr3w.pdfIn PDF document text
    • https://kivalake.weebly.com/uploads/1/3/4/8/134885121/seted.pdfIn PDF document text
    • http://vnds-super.space/xorobc8n5g.pdfIn PDF document text
    • https://lefexaro.weebly.com/uploads/1/3/5/3/135324439/bodan-paregameru-kirugozas.pdfIn PDF document text
    • https://tajuboramaze.weebly.com/uploads/1/3/4/5/134591815/raviledumod_jolububem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414494/normal_5fe0af1c910a1.pdfIn PDF document text
    • http://bottlechainworld.com/libros_cristianos_gratis_por_correohzlqu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409619/normal_603160af136be.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/sdjbwif/drift_away_steven_universe.pdfIn PDF document text
    • https://cdn.sqhk.co/mowuseparap/0gdhbgg/37586521270.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA66 5732 bytes
SHA-256: d985556405bfbc7ca9589d8e6ae07a285e6c6afc141c6dbc3c4bd34be5587c2f
font_01_sfnt_off00010dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC7 11184 bytes
SHA-256: ef17e1e1a2c96408d6b4725e3f6a16283e29ed87e656f0489c9a6554f2aac602

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