Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6ede0d378a9156…

MALICIOUS

PDF

82.0 KB Created: 2020-12-31 06:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9bd07bcd6fc4d813fa590e1550421087 SHA-1: bd3792b14f6f8ded1e275159189790e2c4abddaa SHA-256: fa6ede0d378a91569de990b1efc8c8fb6db37d0f00bbe7dfa2590151c21b1a21
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with the primary URL being trafffi.ru. ClamAV detected this as Pdf.Phishing.Trojan, and a machine learning classifier also flagged it as malicious. The presence of numerous external links suggests an attempt to redirect users to potentially malicious sites, aligning with phishing or SEO manipulation tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/strik?utm_term=stop+capsaicin+cream+burning PDF link annotation
    • https://cdn.sqhk.co/dipujabuxiw/gdIH8oA/lilito.pdfIn PDF document text
    • https://cdn.sqhk.co/lanabeja/ih8hhfI/39648317265.pdfIn PDF document text
    • https://nogegonimever.weebly.com/uploads/1/3/4/3/134340032/a0676014add.pdfIn PDF document text
    • https://cdn.sqhk.co/baxafapunubi/Op2hb5f/27155021114.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/MJ4Ljgz/48267271699.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390071/normal_5fc5c4d7148c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5f8b83ec49a94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5f93a6b20631b.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/bajuse/papelera_de_reciclaje_traducir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f01658d8-236f-4b57-a34a-8ea2445d741c/jepidapaxinibafep.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/42406892562.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/shazam_for_windows_phone_8._1.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/59357335827.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B4 5464 bytes
SHA-256: a6c9fe15be1d408fad69f22ebf48ec9b078746d631a41285681c2722437a19f3
font_01_sfnt_off0000f62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62B 2284 bytes
SHA-256: 68fa8718b8ddde6915ad2ea408e9a6e3e19d9c0bbc944693bd6f07d4abe239d0
font_02_sfnt_off0001008c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008C 10316 bytes
SHA-256: 3308314d0b90f9c2b0f1bb3f48657676677072dc87d988bd1ff0bc74fdce5851
font_03_sfnt_off000123f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F4 16680 bytes
SHA-256: 07b0e9c965f7c67b74254bb77f57152ba44d06d5de25992f48b676bb06b149b6

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