Malicious PDF — malware analysis report

Static analysis result for SHA-256 290154fe12c86a4a…

MALICIOUS

PDF

80.7 KB Created: 2021-02-13 10:05:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 82cbcaa2a51b2728ae6e2528ce0b9cb9 SHA-1: 6093c390b85534edd47a0b244b0a2bb395a35126 SHA-256: 290154fe12c86a4a4da43b18e69da39a5e84dc1c9b699a74f8c1703672f128a0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including one to 'bologen.ru' which is flagged as suspicious. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or a distribution point for malicious content. ClamAV detection and ML classification further support its malicious nature, likely related to phishing or malware delivery.

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://bologen.ru/wb?keyword=information%20management%20tools PDF link annotation
    • https://cdn.sqhk.co/fosulavale/gclXLjh/peburunasizupofazexopik.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/hlOmBwr/92901856498.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408709/normal_5fef8fc83e32c.pdfIn PDF document text
    • https://gunagejosiva.weebly.com/uploads/1/3/0/7/130738835/tediz.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/xuFgfVO/dialogflow_chatbot_whatsapp.pdfIn PDF document text
    • https://ninefajesazaga.weebly.com/uploads/1/3/5/3/135384029/mewosorexevoxefep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421336/normal_60105e6a1b55e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426075/normal_5fddd8e37aefb.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/wefemabeni/3d_map_generator_icons_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/types_of_cells_in_the_body.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/sustainable_building_design_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/79250420941.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/video_lucu_animasi_buat_story_wa.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/53166694714.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/28851393261.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/tirizugavat.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/current_betsie_river_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/35063697096.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_off0000fec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC9 5024 bytes
SHA-256: 264ed9179ef937b7ec03b5d4c7341fc0e0d594d314ccc3a3991bd0d3fe2789b5
font_01_sfnt_off00010fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC6 11140 bytes
SHA-256: 0a495f2384b235a599ce86b20182744d1c83b2e3f8a9887f5ff473cbc83fbd6a

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