Malicious PDF — malware analysis report

Static analysis result for SHA-256 717012cdb07bdac3…

MALICIOUS

PDF

68.9 KB Created: 2020-12-30 00:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 48cd04cd0d4bb2a163572e7f1457bc5c SHA-1: 7e03d570b162b4aa52144f57222995c061033c00 SHA-256: 717012cdb07bdac33346b96c0218851d8c845a16bb070119c03091f1edaeaf45
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various PDF files hosted on external services. One of these links, 'https://trafftec.ru/strik?utm_term=crazy+cee+lo+green+piano+chords', is suspicious and likely serves as a lure or distribution point. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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 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://trafftec.ru/strik?utm_term=crazy+cee+lo+green+piano+chords PDF link annotation
    • https://zabapekiji.weebly.com/uploads/1/3/4/4/134470890/kowogifejavazigodem.pdfIn PDF document text
    • https://zosujugopaw.weebly.com/uploads/1/3/4/5/134509911/db0517f4c6ad.pdfIn PDF document text
    • https://wupibivuvofat.weebly.com/uploads/1/3/1/1/131164023/745aee8a.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/TifA4gf/cross_stitch_patterns_online.pdfIn PDF document text
    • https://bisatabezuniv.weebly.com/uploads/1/3/1/3/131398333/9408654.pdfIn PDF document text
    • https://bidoruwo.weebly.com/uploads/1/3/4/6/134651737/tizigek.pdfIn PDF document text
    • https://pugulewex.weebly.com/uploads/1/3/1/4/131406013/tezat.pdfIn PDF document text
    • https://wowomake.weebly.com/uploads/1/3/4/6/134679477/1859643.pdfIn PDF document text
    • https://nugizutotenit.weebly.com/uploads/1/3/4/5/134502776/4665795.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://uploads.strikinglycdn.com/files/89472006-c2dc-4249-ac6d-be698ad99f14/vapipalowikuweka.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/bebivutofigori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faff606c-aeff-4ffe-b8b5-772b10a4e8d9/tuvatitotidix.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/espn_guide_foxtel.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/light_reflection_and_refraction_class_10_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/powerpoint_calendar_template_2019_free.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/kulujevalazuzefugip.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_off0000c19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC19A 5220 bytes
SHA-256: 515f3ac01e436ebb5675c2ebadbb4081ef3b53ca44426ad7208ce0f980f47a8a
font_01_sfnt_off0000d34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34B 11172 bytes
SHA-256: 5148773504602e006aafd66dcf3045d2a3e011c6d032e4aa66778013d0f9ba95
font_02_sfnt_off0000f870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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