Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3de9be9b265a02…

MALICIOUS

PDF

66.4 KB Created: 2020-12-16 11:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4cf013624d2122171ff6e1dd91881376 SHA-1: 9c6f2dc366920f6ad9b76c118cb082c6a52fbdd8 SHA-256: 6f3de9be9b265a02e9e252ea8775f67deb9bf53c75c4a1fb091c41feb8a07257
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external URLs points towards an attempt to redirect the user to potentially 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
  • 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/123?utm_term=joshua+tree+to+ontario+airport PDF link annotation
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/ec566b2b3.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/kakegibefokow.pdfIn PDF document text
    • https://romasagato.weebly.com/uploads/1/3/4/7/134723475/javapu-takudomepaxif-lopijar.pdfIn PDF document text
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/winotosew-kuziliwag-vedatigajopibuf-nawuwi.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/1238713.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/vemewo_kewevosaded_jujimawesaxa_bojonaxax.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/d7a3b0bacec912b.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/01973edb-aecf-4a0d-a23d-2b6d504b929d/descargar_musica_gratis_de_jenny_rivera_mirame.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/nys_child_support_direct_deposit_cancellation_form.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/76851928464.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/best_golf_swing_analysis_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/86776470174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69b61afe-0f98-4a1f-9e47-ec24499630bb/emoji_movie_answers_level_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975b62ca-373b-489c-ac0f-d7ece287c423/11076692672.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_off0000c522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC522 4864 bytes
SHA-256: e062a0786998f6a295eb15978d6eb8198f2e9eecf70d9c429be9c1fc6bd7d026
font_01_sfnt_off0000d5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A3 11564 bytes
SHA-256: 60a47220da44b5731d8952899cf3270c280b04da95c8b7a566598a04e78f821b

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