Malicious PDF — malware analysis report

Static analysis result for SHA-256 c460ddd5d6795657…

MALICIOUS

PDF

65.4 KB Created: 2020-11-28 11:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d5dbdaeb05e97f4e81679c320ec92d96 SHA-1: 2ca558681107a0034446957558bfbe92036037a7 SHA-256: c460ddd5d6795657c085c1b70387d596688f65742aa725af1a04fe83b74684e9
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable hosting services, indicative of a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly suggest a phishing or malware distribution campaign. While no scripts were explicitly extracted, the presence of many external URIs suggests the document's primary function is to redirect users to potentially harmful sites.

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://trafffi.ru/strik?utm_term=lumitact+g700+manual PDF link annotation
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/42168b3ed37.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/takewi.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/9594994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5fa4436b267e0.pdfIn PDF document text
    • https://sezitekiporav.weebly.com/uploads/1/3/4/6/134627959/xigidinup.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/zexob-panokagebaf.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/9047764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_5f94225a7984d.pdfIn PDF document text
    • https://gudufuremozowa.weebly.com/uploads/1/3/4/4/134403830/918a04f430ccf0.pdfIn PDF document text
    • https://sesesisemiv.weebly.com/uploads/1/3/4/7/134746737/tivowusomol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5fa22b9a2b205.pdfIn PDF document text
    • https://guvodirafed.weebly.com/uploads/1/3/4/4/134475496/5850595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427091/normal_5f9f59008855e.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/jedobufudajewu/isosceles_triangle_base_angle_theorem_worksheet.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC105 5008 bytes
SHA-256: e180d525380a8d1172bb7942c78a4b01a82c16df290a16260c97478c2b2b0654
font_01_sfnt_off0000d209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD209 11444 bytes
SHA-256: aa909cceacfc5c30876457119a72e6b65fb16629b254d0f4149b3fa781f82387

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