Malicious PDF — malware analysis report

Static analysis result for SHA-256 89779b57bf8dda10…

MALICIOUS

PDF

86.7 KB Created: 2021-01-13 01:27:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: b59891bcef2ba85f43682309543b6f17 SHA-1: 45ed93f5e58a5cfafb5ae456fdaee167f4b36f9b SHA-256: 89779b57bf8dda104a31790af4616690c90a5ae242f678d1fa8771b827b31317
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 by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous external URIs points to an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=2d%20pixel%20art%20adventure%20games PDF link annotation
    • https://cdn.sqhk.co/purorelaz/hijfihD/pokemon_sword_hitmonlee_evolution.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/bXhcjb6/27890233828.pdfIn PDF document text
    • https://litaxavuve.weebly.com/uploads/1/3/4/8/134848922/jiraniv_levuzememuti.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwagezo/xGgjHig/chromatography_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/jjb7Egh/movie_quizzes_and_answers_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/egfF191/super_soccer_champs_2020_tips.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/fujadabez/1st_grade_reading_comprehension_worksheets_main_idea.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/xurezesowabeviwanazadowed.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/archaeology_as_anthropology_binford.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/sisepafedi.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/68822318707.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/webavopuzagotoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/95930632961.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/primer_material_2_angular_6_admin_template.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_off00010a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6B 5444 bytes
SHA-256: 6703daf16b635e889ab04b3e7621549cf3e953191457f2a9870a7e5569d69332
font_01_sfnt_off00011cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDC 2744 bytes
SHA-256: 4182daac771eb9e7d5c71e1e543b3d729d4c577f13dad06c499d8de8879a4216
font_02_sfnt_off0001286f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286F 10912 bytes
SHA-256: 8cf81cc461ef4531b12b380c623117f979074fcb4260fc4005c190c4f25a8a2b

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