Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96d66cdd7aa4728…

MALICIOUS

PDF

72.0 KB Created: 2021-03-02 08:56:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: aabfb494084124571fa402fe9debdb04 SHA-1: 9eeb1b60fb0323816df2ea021f92f217fb7d4780 SHA-256: d96d66cdd7aa4728e99b00605ff10811388b6ea1631e0be0e9c06887ef7b999a
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 phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/123?utm_term=define+tipping+point+in+sentence PDF link annotation
    • http://tohld.in/how_to_mix_limco_single_stage_paintf5goy.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/xozezu.pdfIn PDF document text
    • http://temilops.xyz/how_many_sessions_of_emdr_do_you_need_for_ptsdmxnkn.pdfIn PDF document text
    • http://luchdobro.site/dbx_160sl_for_saleak3n9.pdfIn PDF document text
    • http://ritegifufefut.scienceontheweb.net/misewewajipopomab.pdfIn PDF document text
    • https://pipabujul.weebly.com/uploads/1/3/2/6/132680817/9444898c.pdfIn PDF document text
    • http://sun-italy.space/64630125343h4iz8.pdfIn PDF document text
    • http://ersoil.fun/introduction_to_elementary_particles_david_griffiths_solutionsh07q3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piwolimosopobu.myartsonline.com/losupatefut.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/how_much_was_gold_worth_in_1980.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/jomovulerifulonanozali.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/business_strategy_model_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/67581203749.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/migare.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/belling_kensington_oven_manual.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_off0000dc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 4844 bytes
SHA-256: 4434fc35e5dfb5e5b53c6619a34e6b8832cf1685daf73dcd6c84f7c4e90e73ee
font_01_sfnt_off0000ecaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAF 11356 bytes
SHA-256: e2acedd5ab8b93bad729831f74ba9abc2a26f4dfacf4832f87ff2f55fcd24ca7

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