Malicious PDF — malware analysis report

Static analysis result for SHA-256 1088a29db5904b09…

MALICIOUS

PDF

104.7 KB Created: 2020-12-29 13:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 455b2f40010752a440bd41e91c66e739 SHA-1: 9e1b79711ad3aa6578dbcb95e7c3dbd835da3af6 SHA-256: 1088a29db5904b0942546b45bf3bd91425bcd0f6127cecebc3e49b9f027f66b9
244 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links, including a link farm on disposable hosting, suggests an attempt to distribute or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/123?utm_term=phil+collins+no+jacket+required+vinyl In PDF document text
    • https://noxazifegem.weebly.com/uploads/1/3/4/5/134596672/9440080.pdfIn PDF document text
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/neninetewalebus-filuxala.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/wogiselaruto-nokage.pdfIn PDF document text
    • https://severuzilun.weebly.com/uploads/1/3/4/7/134710190/paburugetasuzivuv.pdfIn PDF document text
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/vodipejuno-wasarax.pdfIn PDF document text
    • https://sawobefuridavo.weebly.com/uploads/1/3/4/8/134895752/1230178.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/3c8f7a41-9a5d-4641-935e-d6586d30fcbe/tanelarobaxulisebofivum.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/41139235351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a6739e-66fa-45c6-8d28-f0ad045439fd/wewivok.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/47329254884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f359383-ae75-4305-b5e5-228be41d4e1c/capital_ford_wilmington_nc_service.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a68772-a95c-4883-823b-e276e694da84/tC3BCrev_sC3BCreklilik_iliC59Fkisi_ispat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee36d330-f7e1-4b5c-b2e9-61ebd360e774/vawurerapimepifuxetularu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad6d937-d1fb-4f2c-b3b2-3dff8e7e9024/fijetidugiwuxowazofazil.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_off00015a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A34 5456 bytes
SHA-256: dbad60cb01218371b0faa7a191ec01a1d5c26b78e59bfae3bee1f443a81e445b
font_01_sfnt_off00016ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CCD 12576 bytes
SHA-256: 4fd24e9778ada40b64ce4b387ade888887a8e207d50db09b624965dfcb3f9e24

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