Malicious PDF — malware analysis report

Static analysis result for SHA-256 78af7e88af350324…

MALICIOUS

PDF

68.4 KB Created: 2020-12-22 13:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7f04521d54355ba7dc6b3eb5117973ca SHA-1: c721d1197a485dc0d32c0decfef1d8b734580ba1 SHA-256: 78af7e88af350324562ff2b05758d9fa8311652079849f37c81b706f4bc6cdc6
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this PDF is designed to link to external content, likely for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection suggest a malicious intent to redirect users to harmful sites.

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
  • 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://traffking.ru/strik?utm_term=laval+guide+events+map+weatherford+texas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5fbdb6935532e.pdfIn PDF document text
    • https://danivuvi.weebly.com/uploads/1/3/1/4/131407625/juwomeniz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369324/normal_5f895e7378abf.pdfIn PDF document text
    • https://xobesatiwum.weebly.com/uploads/1/3/4/3/134359431/volegitisofip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413707/normal_5fbe7a8f9e9e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408463/normal_5f94c40d73b6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481065/normal_5fd8306f77476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_5faa0be23b11d.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/fuxazomita.pdfIn PDF document text
    • https://lupuxamugegudi.weebly.com/uploads/1/3/4/6/134623484/vojal.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/0049c82b-dfdf-4231-a0e4-8cab0f32694b/guzabinidazagiwot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09fccf0b-e30e-42d7-9688-2f7fcc03fb6e/arcade_stick_pc_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c37d568-b15a-4bd4-bebe-5252dedd5a79/vevinezupajefagabawidel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db5ca817-21e0-4135-9b8a-8bb982e4121e/40342736361.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_off0000ce4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4E 5616 bytes
SHA-256: 04394011dab42bbc8dff45b465aae16a9da363d05d018826db9facc15c7c8096
font_01_sfnt_off0000e15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15A 10568 bytes
SHA-256: 8eb5292e660352319ba5b1f5f2ddd86f5554223890d05da89bd2eb3c403ebde4

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