Malicious PDF — malware analysis report

Static analysis result for SHA-256 081d7832c8398d00…

MALICIOUS

PDF

72.3 KB Created: 2021-03-27 14:12:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 737f4fd03522621c7e8f066d39131e44 SHA-1: 7f48bff66b9ba966dac9e9d4bdadce2d144ebcfe SHA-256: 081d7832c8398d00549e899391d2c76eb0935adf57be6b5abaf09cb5c2c2db6c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a significant number pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to 'Biochemistry 1st year mbbs pdf'. The presence of external URIs and the overall structure point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://bologen.ru/award?keyword=biochemistry+1st+year+mbbs+pdf PDF link annotation
    • http://brosbass.com/luwusomolaguvad10ii.pdfIn PDF document text
    • https://kevavabine.weebly.com/uploads/1/3/1/4/131406582/dikowafa-ruderuvapib-majarezituxe-kukipeso.pdfIn PDF document text
    • https://rowiteruna.weebly.com/uploads/1/3/4/4/134470704/8123220.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/vebalazedido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5fe814a75bd66.pdfIn PDF document text
    • http://kittyplay.online/the_full_armour_of_god_bible_verse2luhm.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/the_secrets_we_keep_kate_hewitt_synopsis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5fe83f79a6c4a.pdfIn PDF document text
    • http://in-arenas.com/pujevategawazatewafj7ewu.pdfIn PDF document text
    • http://ilkertr.shop/universal_remote_codes_for_onn_dvd_playercjjed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367916/normal_6027cc4a2b1fe.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/vumifug_pimolufu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/be260c8d-8394-40c7-8569-299f1d48857a/28807734562.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_04d0f6a0e8d94be49c82edde1ce1011a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f26166-b053-4dd0-b775-83a31ffc97af/zarapegojuzege.pdfIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_4ce20cc560924ff28b1bbe933b0639a8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e94f349-fc56-4034-8a63-d875fef00101/jadivesamubimi.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://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACB 5708 bytes
SHA-256: 31bc7c22d0e22825f84cdfc72cc0558e94c541f8f0e685c77f48b1b86df28588
font_01_sfnt_off0000ee12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE12 10556 bytes
SHA-256: 58a14ce3fadcac091935203b2b3335ebe2b1f5685578c3c981109db21f9dd476

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