Malicious PDF — malware analysis report

Static analysis result for SHA-256 29201b5e5a54da2e…

MALICIOUS

PDF

65.3 KB Created: 2021-06-02 04:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9445b351c7ce232a6bcd3218a43447c SHA-1: a5c9f045c0cc9c57e211a2014f814cc08630e93a SHA-256: 29201b5e5a54da2ed65f68fdcf8eb91996ec2d68eea30b61ca15d71c303b583b
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to SEO-optimized content, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier further indicate malicious intent. While 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 0.8603

Heuristics 4

  • 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
  • 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://cructi.ru/pbw?utm_term=how+do+i+know+when+to+replace+dyson+battery
    • https://zugowexilib.weebly.com/uploads/1/3/5/3/135349829/juvosanisarisuvi.pdf
    • https://gebifafotuzuwi.weebly.com/uploads/1/3/5/3/135324040/parewekibalujogexomo.pdf
    • https://rosexanovetaw.weebly.com/uploads/1/3/0/8/130814227/wagonixomivetuvu.pdf
    • https://bekawoxe.weebly.com/uploads/1/3/4/5/134529307/dd7b907.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1b58b7ae-5a5b-45ce-a320-a685756e04db/toro_timecutter_ss4200_for_sale.pdf
    • http://vifogajo.pbworks.com/f/letova.pdf
    • https://uploads.strikinglycdn.com/files/c9cea803-39c0-4e1e-8e0d-bf255bbd5dd3/what_size_tires_are_on_a_2017_toyota_rav4.pdf
    • https://uploads.strikinglycdn.com/files/fa7fefe8-f7c5-4602-aef6-7ed0912f7215/futifurobevamoziregezila.pdf
    • https://uploads.strikinglycdn.com/files/bd39eab9-8936-4501-b0cd-4a9fc3f72ba7/prodigy_autocode_talking_blood_glucose_monitoring_meter.pdf
    • https://uploads.strikinglycdn.com/files/4a540165-9cb1-4806-b08d-7ca274c4a9fc/what_do_resistance_bands_do_for_glutes.pdf
    • http://ridelox.pbworks.com/f/veguz.pdf
    • http://rugewenuzed.pbworks.com/w/file/fetch/144423066/wugisixezenikowuvepevil.pdf
    • https://uploads.strikinglycdn.com/files/62cd1946-ead2-4064-9f98-7923f7c18ca2/radejabizaxenezuxasusotor.pdf
    • https://uploads.strikinglycdn.com/files/8f5943f0-967f-48ed-8e11-f20d57bb35f3/razer_blackwidow_ultimate_switches.pdf
    • http://vadibun.pbworks.com/f/44455790463.pdf
    • http://bilabegape.pbworks.com/f/kagiri.pdf
    • https://uploads.strikinglycdn.com/files/3a7ac8c0-c7f1-401d-aa83-72903ed256aa/wimeposasuxidizubenurin.pdf
    • http://liwuvedesisu.pbworks.com/f/26250361974.pdf
    • http://sokulus.pbworks.com/f/25158088529.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dace.bin
e153fd190cfdd7192863b8f0b704b0cd296a9b645e1c9b8c91a3c993b4c622b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDACE 5520 bytes

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