Malicious PDF — malware analysis report

Static analysis result for SHA-256 7411ca49d84ec385…

MALICIOUS

PDF

76.2 KB Created: 2021-02-24 15:17:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 044b0c0c9d36152e4cc32b2ceb01fb59 SHA-1: c9b4d101f00e8fc1ec80eedf8676e62f10a3f1e1 SHA-256: 7411ca49d84ec385e4829561a0964c1e477f47dd01408a302f742ade98bf12f0
156 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a critical finding for a link farm containing numerous external PDF links. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the presence of a link farm suggests an attempt to redirect users to malicious sites or download further payloads, aligning with a phishing or content distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wb?keyword=club%20dead%20charlaine%20harris%20pdf PDF link annotation
    • https://cdn.sqhk.co/zupodejadofe/LVidjDT/72479032517.pdfIn PDF document text
    • https://bunivuwavimi.weebly.com/uploads/1/3/4/7/134706582/leneturezelo-komunuxurifo.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/c7EMiaO/faleduza.pdfIn PDF document text
    • https://delitulasuv.weebly.com/uploads/1/3/0/7/130775658/pumoleboro.pdfIn PDF document text
    • https://cdn.sqhk.co/nagigureti/3P11hoC/wood_block_puzzle_games_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/HjjFPwA/paraseritupil.pdfIn PDF document text
    • https://cdn.sqhk.co/kajemuwasutu/ewiaRH9/home_arcade_game_room.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/4041154.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/j6D2GLB/36023645036.pdfIn PDF document text
    • https://rixajijinuroje.weebly.com/uploads/1/3/4/4/134473879/de9fbaa31d0d237.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/penale/kasanekipukugusisab.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/35756382255.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/dead_island_riptide_mods_xbox_360.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/yet_another_bad_time_simulator.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/93622881988.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/bpsdoha_report_bee.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/59773645378.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/hr_management_system_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/birthday_coupon_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/biochemistry_past_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/wilukibe.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/wexugu.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_off0000eeff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFF 5288 bytes
SHA-256: ee98c5fde604df4f1a5fbddb64870662fe139653cefe64feed9971d51db0a046
font_01_sfnt_off000100e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E8 10200 bytes
SHA-256: ba0e3ab105a9628f0f265a9333b1744cff3cc7abe72beb0388441846864fb8b9

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