Malicious PDF — malware analysis report

Static analysis result for SHA-256 455b9021cc117627…

MALICIOUS

PDF

80.5 KB Created: 2021-03-20 11:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4504109c4133812b1a2a13f4d5a1c7f7 SHA-1: 20e0016944e1e084bdedef8afc3c7cb981d7e69d SHA-256: 455b9021cc1176274a94cd9ca723689ffe3b9a6ae409b63c4a4502df26cf9bb5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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.
  • 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://seumenha.ru/award?keyword=cnc+milling+machine+cutting+tools+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424328/normal_6028b3bb1a424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451375/normal_603833136f5b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416490/normal_5fc6a07ebde1e.pdfIn PDF document text
    • https://wufisosudima.weebly.com/uploads/1/3/0/8/130874090/3208205.pdfIn PDF document text
    • https://wexubowepupewaw.weebly.com/uploads/1/3/1/8/131856394/3945681.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412570/normal_600932f9d00c1.pdfIn PDF document text
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/5356846.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/bipepezuwed/artificial_intelligence_in_agriculture.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/66468879522.pdfIn PDF document text
    • https://e8e87dc5-637d-47ba-9de6-e7d98d123d78.filesusr.com/ugd/a69a03_8afe5e89194048de8ff89d766b07608a.pdf?index=trueIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_64541b4d6a2348e58a721bbc4b88ba42.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wurivuve/powerpoint_birthday_card_template_free.pdfIn PDF document text
    • https://9fb0fece-6c2a-4f8b-8ff1-5d9ea67f5ee7.filesusr.com/ugd/f6a907_41ce7386293844969cc4049e2ef821a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomogas/english_alphabet_for_spanish_speakers.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/81073616169.pdfIn PDF document text
    • https://efe523a3-d756-4f55-ba91-412f3a718e00.filesusr.com/ugd/236571_e425d1e13002454eb259f27dfc6c9337.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/jinja_template_render_to_file.pdfIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_297a4d2702c245f49184129bacb54e43.pdf?index=trueIn 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_off0000fd58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD58 5376 bytes
SHA-256: 8aefdeee44bcf2706fff2fb999e3551d38b9b454304dea8e10164854141ff624
font_01_sfnt_off00010f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F81 10964 bytes
SHA-256: 88ca125ab995c30fb9181b3ce8203a387bc7d220d61d93ff1cbb79f5f09672cc

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