Malicious PDF — malware analysis report

Static analysis result for SHA-256 e085ce339043def0…

MALICIOUS

PDF

93.9 KB Created: 2021-05-09 15:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c23283f51b40149a0a83684c1aa72afb SHA-1: 2070071beca02bc97177273d53444b75258182bc SHA-256: e085ce339043def02036ecd02a2e6e6a6f54b72e7d3ca58ff8e6b11e2d9326ba
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, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of numerous unknown and potentially malicious URLs indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=burning+wheel+wiki
    • http://legibovusapezo.mypressonline.com/lujuxidukukup.pdf
    • http://vizexibidoxi.getenjoyment.net/22044853730.pdf
    • https://wugizagopa.weebly.com/uploads/1/3/5/3/135311922/2eb71e78f77.pdf
    • http://jepewadagamer.scienceontheweb.net/90164321816.pdf
    • http://reduslimitaly-ufficiale.site/9359842816535qdh.pdf
    • http://tixokapine.mypressonline.com/birap.pdf
    • http://natbeach.space/63902978551xfem0.pdf
    • https://salupoxegiras.weebly.com/uploads/1/3/5/9/135961269/667529a55.pdf
    • http://gepanukotex.getenjoyment.net/liste_aliments_riches_en_fer.pdf
    • http://sigixexizo.sportsontheweb.net/analogy_reasoning_examples.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dutuzanob/acting_lessons_game.pdf
    • https://s3.amazonaws.com/wipotegadodorek/i_fratelli_adelphoe_terenzio.pdf
    • https://s3.amazonaws.com/nakuzafol/75523138269.pdf
    • https://s3.amazonaws.com/gebukil/41145423704.pdf
    • https://s3.amazonaws.com/semuxemakaw/fusadimarege.pdf
    • https://s3.amazonaws.com/liluvad/snugride_30_base_walmart.pdf
    • https://s3.amazonaws.com/sixenogafopoj/code_128_font_excel.pdf
    • https://s3.amazonaws.com/kitakilesa/60098112224.pdf
    • https://s3.amazonaws.com/lowuwofuxali/the_stand_2020_uk_air_date.pdf
    • https://s3.amazonaws.com/wexukufedepim/jagafinunoziba.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f36b.bin
f0532a98b4ed50be490aa20cb9f5627410e4d83f8eb1b089a37854c03866faba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF36B 13416 bytes
font_01_sfnt_off00011f11.bin
5068166e4ba0ffa24fe9e09b42da2758fa204c890d62fe9597dae23cdf36ad77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F11 4764 bytes
font_02_sfnt_off00012f56.bin
08ce58439c85e58127367e2c2c09d585cf2bf9824debf3ef810edb0886f3df6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F56 11108 bytes
font_03_sfnt_off0001553d.bin
c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1553D 16092 bytes

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