Malicious PDF — malware analysis report

Static analysis result for SHA-256 79bd7a73f211ae67…

MALICIOUS

PDF

77.8 KB Created: 2021-05-20 01:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3ee1485189ac75bbfaa256226cdf0b19 SHA-1: 2c5a4386bf6d4ef9f70dc54378574884fac08084 SHA-256: 79bd7a73f211ae676a7399fbdef8a76a2150fe36f5bab636fc5c5fdda2c98038
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/strik?utm_term=how+to+contest+a+quit+claim+deed+in+florida PDF link annotation
    • https://baseparefawufif.weebly.com/uploads/1/3/1/4/131453046/630736.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/2942317.pdfIn PDF document text
    • https://xenizejaruwew.weebly.com/uploads/1/3/4/7/134709329/37502.pdfIn PDF document text
    • https://fokifukamanur.weebly.com/uploads/1/3/0/8/130874497/778e0d7.pdfIn PDF document text
    • https://dipofivebizog.weebly.com/uploads/1/3/2/7/132712563/pivilisegukowi.pdfIn PDF document text
    • https://lugukeku.weebly.com/uploads/1/3/1/4/131407734/kuzimizijuborexup.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/zelepikugig.pdfIn PDF document text
    • https://girusetobar.weebly.com/uploads/1/3/1/0/131071114/gagusi.pdfIn PDF document text
    • https://fijitedutim.weebly.com/uploads/1/3/1/1/131164269/75d25c7.pdfIn PDF document text
    • https://xajekegok.weebly.com/uploads/1/3/3/9/133997321/2030441.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/ditiruz/baba_yaga_song.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/satta_king_desawar_gali_ki_report.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/saeco_-_xsmall_vapore_2000_super-automatic_espresso_machine_-_hd8651_14.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/buxabomewekewanog.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/ruger_lcp_2_mag_extender.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/grade_10_algebra_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/baby_lip_kiss_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/assassin_s_creed_3_deluxe_dlc_pack.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/what_is_the_most_powerful_weapon_in_norse_mythology.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/starfinder_society_additional_resources.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/bopun.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/lenivulorifujedovi.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/59347188017.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_off0000f2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D4 5348 bytes
SHA-256: cb83369d94070a064fabd156dc69ce256a0ba9dd44968572ee5c0e8376b4327b
font_01_sfnt_off000104f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F8 10884 bytes
SHA-256: e5001005febae4ccf8c0cddf97a5c403020edfb24f097640ea6131ec36b0f435

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