Malicious PDF — malware analysis report

Static analysis result for SHA-256 952180e2b40ae571…

MALICIOUS

PDF

75.5 KB Created: 2021-01-14 10:56:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 509563cd23715735c26b0c07d371ef5a SHA-1: 4fae8f30696cebfb240912a8a7a6b8b0e24550b3 SHA-256: 952180e2b40ae571ea52f26e53ebe181fbc11557f8f8e88c575685be987d3662
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely lead to malicious content or phishing sites, aiming to deceive users into clicking them.

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://trafffi.ru/aws?utm_term=audyt+energetyczny+budynku+jednorodzinnego+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5fae13142a1f4.pdfIn PDF document text
    • https://dafelubuvotaxid.weebly.com/uploads/1/3/4/7/134753950/mususope.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/7d79f4c.pdfIn PDF document text
    • https://site-1166749.mozfiles.com/files/1166749/first_4_words_of_the_declaration_of_independence.pdfIn PDF document text
    • https://wiwajefe.weebly.com/uploads/1/3/4/6/134676348/1904479.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443823/normal_5ff3502ca47e2.pdfIn PDF document text
    • https://xajijalati.weebly.com/uploads/1/3/3/9/133997138/57213707.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530036/normal_5fceebdfa8617.pdfIn PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/72ee9adfa549.pdfIn PDF document text
    • https://site-1172884.mozfiles.com/files/1172884/turbo_dismount_2_game_y8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f8f934641966.pdfIn PDF document text
    • https://fizokufewof.weebly.com/uploads/1/3/4/0/134096090/394e6e82.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/2139229.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_off0000e71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71C 5324 bytes
SHA-256: bcd1f503b0e7efdf2b0a48c2478d092881d8b4800969d4e1ac37f9a5fd94f9d3
font_01_sfnt_off0000f96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96A 12016 bytes
SHA-256: 65e6a9459c89f9d2ef907b989420dec8a2093fd2885031aa8ebb69b31e4b4368

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