Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ac3973213bf884…

MALICIOUS

PDF

66.1 KB Created: 2020-11-21 17:20:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 03e96c19babecd5909f5b8c29a3096e3 SHA-1: b5c8e69dc4ebb2e37b1722ad45521ff28dcd47b5 SHA-256: b2ac3973213bf8847214cee61d68c5dc8b6dbc6dcbb7c0a3355e248bf9154d71
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were extracted, the presence of numerous external links suggests a content-driven lure.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=keller+dovetail+jig In PDF document text
    • https://madovokego.weebly.com/uploads/1/3/1/4/131409717/deruf.pdfIn PDF document text
    • https://felanixumuxovex.weebly.com/uploads/1/3/4/7/134705369/bezuk-pelililit-juliveki-waxodaka.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/3ff63a3e0e0a0dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f89316143ad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_5fa2fdbda3a2a.pdfIn PDF document text
    • https://xixunogada.weebly.com/uploads/1/3/4/3/134343035/8423103.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2818d98-a535-43f4-92eb-fa3d8ae722fc/wopodeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d947027c-d177-4098-9711-fdac5135b3f8/bim_project_execution_planning_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0bbf174-ac45-46c8-a138-7fb97ea31374/renew_online_texas_id.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33099ce6-cf52-4142-940e-e56bfd75b7f7/chat_master_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/545947de-27de-4d9a-b218-b75176423be3/zakomunumogixagewiluwuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e274672f-427e-4388-8109-4ee69d1ee653/laveta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/902af2ba-37fe-4750-9023-064b9e00e971/dovukekanabijozowebodopij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0099d37-392e-4383-af20-1c08d95bbe29/73426473904.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_off0000c76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76D 4920 bytes
SHA-256: 2b1e1225add812b1b94b16cf73f60f6e0ef32de8cd6d6dd4729de9c3cb62436d
font_01_sfnt_off0000d848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD848 10448 bytes
SHA-256: dad31b1ce3d4581307f14159bc9a9e2bb844e5f31165e7d61d0326c8f2d52d89

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