Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46e20dcb6f872e1…

MALICIOUS

PDF

96.1 KB Created: 2021-03-04 13:55:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45659e3cb61050357467919793a7015e SHA-1: e19c984b5a0ff9290b3ab90500110b9d3419cfdc SHA-256: b46e20dcb6f872e17e3ae550a36495672ced948582c1dd4de2cd553159286d81
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to legal services or contracts. The presence of multiple PDF links and the ML classifier output strongly indicate malicious intent, likely to redirect users to malicious websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://ponafet.ru/strik?utm_term=business+contract+attorney+near+me
    • https://cdn.sqhk.co/lufelumad/jbidIDJ/how_to_make_knife_glasses.pdf
    • https://fexupewoxi.weebly.com/uploads/1/3/4/6/134619994/3515608.pdf
    • https://puvedevedumu.weebly.com/uploads/1/3/1/4/131406841/65de4e309.pdf
    • http://bixaxivajujojar.mypressonline.com/mudabi.pdf
    • https://sekojeti.weebly.com/uploads/1/3/4/5/134583019/wometelori_repidugamoga_dexesijuroxo_zivajabazi.pdf
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/gogas.pdf
    • https://cdn.sqhk.co/gewanunu/1xBjfgf/43842218690.pdf
    • https://cdn.sqhk.co/gusoguribus/7iahdjf/classic_chess_sets_wooden.pdf
    • https://cdn.sqhk.co/xefilelo/Ypjf3D1/campgrounds_near_chattanooga.pdf
    • https://jetapixivokob.weebly.com/uploads/1/3/4/7/134726526/kolezudisasezo.pdf
    • https://daxulidotuviwo.weebly.com/uploads/1/3/4/5/134597057/1017352.pdf
    • https://zarimuxeve.weebly.com/uploads/1/3/4/8/134897304/supanorivefatexuron.pdf
    • https://cdn.sqhk.co/baxorurifina/ghhjfTB/14263565064.pdf
    • https://sutogeva.weebly.com/uploads/1/3/0/7/130739298/9505861.pdf
    • https://vexefanakaxaki.weebly.com/uploads/1/3/4/8/134871487/virelozig-ditesof-xamulazijug-xogodonuvalo.pdf
    • https://lulapusorifat.weebly.com/uploads/1/3/1/4/131436971/nosekasatodi.pdf
    • https://nirumoxizexajiv.weebly.com/uploads/1/3/4/5/134524745/6709151.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vejegaba.atwebpages.com/bosch_dishwasher_silence_plus_44_dba.pdf
    • https://s3.amazonaws.com/fofeguj/55847498809.pdf
    • https://s3.amazonaws.com/naxozelozude/68499374353.pdf
    • https://s3.amazonaws.com/lerezazo/babuji_dheere_chalna_new_version.pdf
    • https://s3.amazonaws.com/wowonesoribu/asientos_de_ajuste_contabilidad.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a29.bin
2006c83cb8534772fa173793d7ee4eb8fca2dfe484f09066abb9f67afcfd0654		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A29 5064 bytes
font_01_sfnt_off00014b59.bin
f05e1584fac6d002295e0639537d0196cc3440236183faf1361ea242e2c5fb2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B59 11192 bytes

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