Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1595aa42db7d7b…

MALICIOUS

PDF

37.0 KB Created: 2020-05-22 03:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 265de588bc2149de42b9227521c6b808 SHA-1: 704ffcf9be012b2de0f5701af9b090c5259bf58a SHA-256: 4f1595aa42db7d7b855ae2ec0ffd9cc44d3a4c273f7e4872ca94f20b1804fae8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malware or phishing content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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 http://74-123-73-55.mgwnet.com/uploads/1/3/0/5/130542852/130542852.html#edexcel+a+level+chemistry+revision+notes+pdf
    • http://cassimcampbell.com/uploads/1/3/0/4/130435725/8535004.pdf
    • http://mail.printplusprintingcompany.com/uploads/1/3/1/3/131383720/kadeduwo.pdf
    • http://fatjaysbbq.com/uploads/1/3/0/5/130589010/fepotixumuxivex_zujogapumizi_dofidemumuja_dodefagixi.pdf
    • http://dougvandalinda.com/uploads/1/3/0/8/130814187/rolagogegasit.pdf
    • http://hautlescoeurs.net/uploads/1/3/0/6/130604579/5db160f24a0348.pdf
    • http://klikstarter.com/uploads/1/3/0/4/130483767/dobidib.pdf
    • http://mymssp.info/uploads/1/3/0/4/130483355/tuvowedexenujok.pdf
    • http://tribezthemovement.com/uploads/1/3/0/6/130604067/musevatifopotobes.pdf
    • http://kemcutisekolah.net/uploads/1/3/1/1/131164392/buwemenevut.pdf
    • http://davidjmudrak.com/uploads/1/3/0/3/130379488/3310aa.pdf
    • http://texascommercialfinance.com/uploads/1/3/0/6/130620266/8d3d3da3f20d.pdf
    • http://tinbabv.com/uploads/1/3/0/6/130621555/7618865.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006402.bin
4a028d7ce6ef4d0226432d6173393e34541a0e591a8a7cf413770d1ddfbb98e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6402 10716 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.