Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abdf3924914fefa…

MALICIOUS

PDF

35.7 KB Created: 2020-05-21 16:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 735a226fb3fa01cf8a49a4f0e7c5e1ec SHA-1: 8836a4da6492522725956b4cf93b11cad270bfdc SHA-256: 5abdf3924914fefa03ce3cb0c1ca40f641da18fdf5baf7973595bd539294031d
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of numerous external PDF links. The document body text, though partially corrupted, includes the phrase 'Captive in iran pdf', which may be a lure. The primary attack pattern involves directing users to a multitude of potentially malicious external resources.

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://bytecubed.io/uploads/1/3/0/4/130489627/130489627.html#captive+in+iran+pdf
    • http://bettereditor.net/uploads/1/3/0/3/130313561/xevatapola-nazugu-fubas-tufitasupuwesa.pdf
    • http://useitupwearitout.com/uploads/1/3/0/6/130620228/5838539.pdf
    • http://sofancyonabudget.com/uploads/1/3/1/3/131378852/f0f8d9985b1c.pdf
    • http://betelpaintco.com/uploads/1/3/0/6/130621776/ccc3530fa.pdf
    • http://mikefaverman.com/uploads/1/3/0/4/130491699/jurozamoliwagini.pdf
    • http://bluelightsystem.com/uploads/1/3/0/9/130969418/wenatuvomi.pdf
    • http://beyondbeliefthebook.com/uploads/1/3/0/5/130546519/bafozevowejod.pdf
    • http://officialdup.shop/uploads/1/3/0/6/130620691/feb2bf2d25d0.pdf
    • http://indiantrailestates.com/uploads/1/3/0/5/130590583/4923859.pdf
    • http://candireignband.com/uploads/1/3/0/5/130590154/kesebixukazite_mumivapunobus_rawajo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ffa.bin
82de1315d0906627045d405c45d7e856d45bdaa6cb15c34c776ff87baf9344da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFA 11884 bytes

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