Malicious PDF — malware analysis report

Static analysis result for SHA-256 04011adb5e4339db…

MALICIOUS

PDF

76.3 KB Created: 2020-11-09 22:35:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e5fbcf57d351e2360a1e627996838090 SHA-1: 5b2f24ddcd734526cd989d8d06a4b56aea9e78b3 SHA-256: 04011adb5e4339dbde4979ab5c9124a4d038143e51a463cb4d0502ceeb4af64f
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to drive traffic to various sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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
  • 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://ggtraff.ru/aws?keyword=keto+buzz+pills+do+they+work In PDF document text
    • https://vibupawovilopi.weebly.com/uploads/1/3/4/3/134377541/2000866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379961/normal_5f8b74dfd9cc2.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/jegezel_lijutunemi.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/fokapikow/mipetelunizuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa92332-ebb7-4495-a2b3-b94b2ea28d1b/92079739445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a2552f0-4d91-4c4f-8883-5ffdec95332d/sasiverotojogeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c0b0048-2597-4066-9292-88affab47a7e/72817332347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f24a59f-1db6-4983-a400-a25ba33b4558/81987878653.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_off0000ef77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF77 5252 bytes
SHA-256: ba3bd78eb632f36db5d627edd9d71e9b3a909d2aa34da68a55be5c542ceac088
font_01_sfnt_off00010164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10164 10428 bytes
SHA-256: 9b50920681093d215adbd628bbbd3008a887e2e0eeb9bbbb5c66f022cd7cdb41

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