Malicious PDF — malware analysis report

Static analysis result for SHA-256 e281712bc4f17e92…

MALICIOUS

PDF

106.7 KB Created: 2021-03-16 20:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d8ea6fb331d41b8e1b8db6039305ff9b SHA-1: db0c1395a8c756eb710ac5f2c4813de1f493b384 SHA-256: e281712bc4f17e925d26a0dd70644567ebfc06d68334ca2b56827e112d677da0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, likely intended to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's part of a phishing or malware distribution campaign, potentially using embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://jumiwimov.ru/wix?keyword=the+living+earth+biology+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425501/normal_5fc874c3de1ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460263/normal_60501d141c17e.pdfIn PDF document text
    • https://finibolamojirum.weebly.com/uploads/1/3/5/3/135341575/pizorasex_jevesagedej_rapexa_gazedaxijefa.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/5033148.pdfIn PDF document text
    • https://bixagitiwor.weebly.com/uploads/1/3/4/6/134618264/mogafa-navokej.pdfIn PDF document text
    • http://teenagetutor.net/741571903061n9yx.pdfIn PDF document text
    • http://nuveclovet.xyz/kisibedipunoqzfmt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368496/normal_5ffa11162ea76.pdfIn PDF document text
    • https://mowavowami.weebly.com/uploads/1/3/4/5/134591552/wobapeluxev.pdfIn PDF document text
    • http://instapriz.site/bejudil01hrt.pdfIn PDF document text
    • https://xuwatezifi.weebly.com/uploads/1/3/5/3/135305435/watopigumevepusaxal.pdfIn PDF document text
    • http://instapriz.online/christian_counseling_ethics_sanderskrdix.pdfIn PDF document text
    • http://sexesex.site/58618960899b2jsz.pdfIn PDF document text
    • https://bijuxoku.weebly.com/uploads/1/3/4/9/134901677/7195259.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/how_to_get_a_land_contract_in_michiganykpyp.pdfIn PDF document text
    • https://sugelama.weebly.com/uploads/1/3/4/8/134898925/xamezujuzetok.pdfIn PDF document text
    • http://praktika-ingenieur.com/rixojipepirekotind90u7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_602204a0313f7.pdfIn PDF document text
    • https://bunavomotuta.weebly.com/uploads/1/3/4/6/134606544/4327f04ff9f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_1da8029c9ae84d929f94fa3ecdd3a28d.pdf?index=trueIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_52a1d0ac46574a83bc73e50ad6721709.pdf?index=trueIn PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_344f1f5aa0ce4bd986d4275eb9219c02.pdf?index=trueIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_f78ffdc75d8044288f3232ac22f3d9df.pdf?index=trueIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_23334247762d4c74b4c95211d07cc130.pdf?index=trueIn 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_off00015fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FC1 5352 bytes
SHA-256: e7b7567c1c2a7b3ce0c1e9884f35f8223343922956b7c878bf491735ee98b2cb
font_01_sfnt_off00017211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17211 13520 bytes
SHA-256: 885ab075d84ee0e6f392f74332de20d3d1a14d95bf1a1d91f6d00490fbe8e00d