Malicious PDF — malware analysis report

Static analysis result for SHA-256 5864e1e4f4677c16…

MALICIOUS

PDF

69.9 KB Created: 2020-11-19 03:09:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6e42b5101acca1bd3ba50e200c4cbba4 SHA-1: 69ee5aec5b2c85bd3616d6b8e8caa9248b8128f0 SHA-256: 5864e1e4f4677c16d29f039a5a8037cc0e5c82f51e589b889eaad1fcd3b69afa
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting services, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to potentially harmful sites.

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
  • 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.
  • 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/123?utm_term=como+crear+abundancia+chopra+pdf PDF link annotation
    • https://roromitekavu.weebly.com/uploads/1/3/4/5/134528712/diroguzomuzuw_puzitiwomovubu_medono.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/kamonaxa_domivejibiji.pdfIn PDF document text
    • https://mexugagerow.weebly.com/uploads/1/3/4/4/134482965/7599982b12bd5.pdfIn PDF document text
    • https://maritomumotoko.weebly.com/uploads/1/3/4/5/134512683/6812422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428061/normal_5fa30a9b8d09b.pdfIn PDF document text
    • https://zopopalolidipe.weebly.com/uploads/1/3/4/5/134500843/femosonadevixisagu.pdfIn PDF document text
    • https://vozapevozatoka.weebly.com/uploads/1/3/4/0/134097066/tewolerex-vebafog-gakufuzanad.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/481069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5f937dbb26b3c.pdfIn PDF document text
    • https://tetagusupawuwag.weebly.com/uploads/1/3/4/5/134586179/borewageguluz_tedujap_badoxefabob.pdfIn PDF document text
    • https://dudonufol.weebly.com/uploads/1/3/4/6/134634650/892422.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/donake/business_management_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc89b88-18a6-4e8d-8bc2-bab42ee3ecae/40396588328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554b4975-8ea8-498c-bc0e-1ce67fc3de86/24711783992.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/nuxozafup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC622 5148 bytes
SHA-256: 10f02c9828582b27f9bd97e533dc69193b7e423db434d65d98e6a07ef5341bb1
font_01_sfnt_off0000d760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD760 11016 bytes
SHA-256: 2a1e484ad2bbbe9358afb685c69dbd14f99b4600056f27d56972ff6dcfb52668
font_02_sfnt_off0000fb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB08 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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