Malicious PDF — malware analysis report

Static analysis result for SHA-256 16103977a6262806…

MALICIOUS

PDF

75.7 KB Created: 2021-02-19 00:39:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8bb53a7df58c922b70fb4c5b35eebc5c SHA-1: 64285ab5874dd9fdbf036cd4fb5939335f71a795 SHA-256: 16103977a62628066d9d72ca5d3ca38406d63ff45b906958855a8ec36952799c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://leonvi.ru/aws?utm_term=merchant+of+venice+summary+and+analysis+pdf', is likely part of this scheme.

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
  • 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://leonvi.ru/aws?utm_term=merchant+of+venice+summary+and+analysis+pdf PDF link annotation
    • https://rovepegolotiru.weebly.com/uploads/1/3/4/3/134319415/robusewutine_pekaboduvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466154/normal_60278f472b33c.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/8218616.pdfIn PDF document text
    • https://gobodukigibab.weebly.com/uploads/1/3/1/8/131856162/wepivigirorukof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393628/normal_5fc89b5fbfec9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_5fe83c79cf02a.pdfIn PDF document text
    • https://dasovarelebeji.weebly.com/uploads/1/3/4/7/134712834/savitesog.pdfIn PDF document text
    • https://mivagadak.weebly.com/uploads/1/3/4/5/134599435/wolodafe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401692/normal_5ff7856aa393f.pdfIn PDF document text
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/0afb1f417c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_5fe7eca9ec587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455659/normal_5fea370fa235e.pdfIn PDF document text
    • https://wenojobopowegit.weebly.com/uploads/1/3/4/8/134879608/1064868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427538/normal_601f32e256463.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403273/normal_6006f23340b11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382617/normal_5ff21b5f312ca.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_off0000eb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB93 5564 bytes
SHA-256: 2d62f770a6b44913ea1677015a8b8c222d34622b9abf4c7ea4de5ed2f3719871
font_01_sfnt_off0000fe72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE72 10328 bytes
SHA-256: 678111b0842e9704782194ef43afd77305087ba0fd4e103fc3095b8a6ae390f9

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