Malicious PDF — malware analysis report

Static analysis result for SHA-256 6298727466fe0b7e…

MALICIOUS

PDF

76.3 KB Created: 2021-02-23 02:27:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e963c4496749ffe6357f8969933c2368 SHA-1: 8069841087b7a281321b3f969fd3f1f27a3b40db SHA-256: 6298727466fe0b7e44ad6d304fb83cfd26c48bff25393802dff77f3da2488574
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 link farm, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=how+to+use+elastic+bands+for+exercise PDF link annotation
    • https://labelamujevodit.weebly.com/uploads/1/3/1/6/131606697/xigase_mizixemozunu_jinepavatilubar.pdfIn PDF document text
    • http://heleogose.online/duvipojymle.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475204/normal_5fe1088068a01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_600dd64347d91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413978/normal_6008f9489ba0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_6026a70db72ea.pdfIn PDF document text
    • https://ruwegevenimeva.weebly.com/uploads/1/3/0/9/130969935/xexabuz.pdfIn PDF document text
    • https://xefigokilevugez.weebly.com/uploads/1/3/5/2/135299251/7027722.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444092/normal_5fef01b61d3a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388825/normal_6022511fa8d99.pdfIn PDF document text
    • https://lokejefu.weebly.com/uploads/1/3/5/3/135301848/8e694c1d3c85277.pdfIn PDF document text
    • https://nimafomu.weebly.com/uploads/1/3/2/7/132710507/jodizuworaguka.pdfIn PDF document text
    • https://sevogumomupu.weebly.com/uploads/1/3/4/0/134018352/6603704.pdfIn PDF document text
    • https://noserosajegupa.weebly.com/uploads/1/3/1/4/131453720/4893565.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446776/normal_5fe49f5d076b4.pdfIn PDF document text
    • https://xogofodaromaf.weebly.com/uploads/1/3/4/3/134387758/jisusef-gozegikeki.pdfIn PDF document text
    • https://xiwupegolowiba.weebly.com/uploads/1/3/1/6/131606046/zefug-naferuse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tafaredos.rf.gd/barf_si_song_armaan_malik.pdfIn PDF document text
    • http://tugojan.rf.gd/bedevilled_movie_480p.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_off0000ec9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9B 5276 bytes
SHA-256: b48d0283d7a57fc580454c0cca768bd8b8c438923745ca9e5847244fb9f0e8cf
font_01_sfnt_off0000feac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAC 10368 bytes
SHA-256: 4f27bc70f1f899fd1be79c1db267f66f113e54df27e63fdc63d78ad6bbd32528

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