Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27e06e479dc7715…

MALICIOUS

PDF

74.3 KB Created: 2021-02-23 14:35:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3a7f598ef5c366c05c7ae823f1de99cd SHA-1: 3dbccf179179cbb8258ff9a10aecf247c43e050d SHA-256: e27e06e479dc7715e51909d7096c72be3350e44d61f96d87e84b35324d859468
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://crophysi.ru/123?utm_term=what+is+the+best+food+game+console PDF link annotation
    • https://zijoganidilo.weebly.com/uploads/1/3/1/8/131856317/73932c33.pdfIn PDF document text
    • http://fitness1.space/3810348549011iv3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_60183ea470808.pdfIn PDF document text
    • http://unosital.space/8878671231117nbt.pdfIn PDF document text
    • https://sepiboberad.weebly.com/uploads/1/3/1/1/131164555/kidujivevarud-sekubuxuz-fupiradubujiv.pdfIn PDF document text
    • http://digitaloffice24.ru/70077220606fsg6v.pdfIn PDF document text
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/b8907.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428078/normal_5fce4dd8a92de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_600a3aba166a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501659/normal_5feb2369558c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ragejufa/59142739366.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/magna_carta_definition_us_history.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 8

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_off0000e4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FB 5492 bytes
SHA-256: 1e5307cfcfe2274880e50aeed89d8141744540fddf43994ded8e01754bdf1075
font_01_sfnt_off0000f796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF796 10788 bytes
SHA-256: ac9bfeb61558cd63a46f1d237ce439396d5f900b85c3f4ebedcdd1ddbf5caab0

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