Pdf.Dropper.Agent-8196784-0 — PDF malware analysis

Static analysis result for SHA-256 03202b07461681b9…

MALICIOUS

PDF

36.7 KB Created: 2020-06-06 05:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 038d875dee584e37309c18e05708618c SHA-1: e11d87faf03b9c81e790e53469cff2e1c82b13f1 SHA-256: 03202b07461681b98d28f1bc17cfcb362e1e1955f81222b82ef0e65bd8f53fb8
176 Risk Score

Malware Insights

Pdf.Dropper.Agent-8196784-0 · confidence 95%

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, specifically identified as a dropper. It contains a large number of external links, suggesting a link farm or redirection mechanism. The presence of a 'Macro/content-enable lure' heuristic indicates the document likely attempts to trick the user into enabling content, which would then facilitate the download and execution of a secondary payload from one of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.Dropper.Agent-8196784-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8196784-0
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://2u.undesirable.us/uploads/1/3/1/4/131438432/131438432.html#ecology+unit+study+guide
    • http://hostmaster.pegasus-software.co.uk/uploads/1/3/0/6/130605341/7420007.pdf
    • http://immersivesafety.com/uploads/1/3/0/2/130288326/kegiraxosumoguxokimu.pdf
    • http://ok4kids.org/uploads/1/3/0/3/130379111/daxodetowe.pdf
    • http://radiantalchemywellness.com/uploads/1/3/1/6/131606755/1929089.pdf
    • http://securevault.us/uploads/1/3/0/9/130969535/840a977be.pdf
    • http://ewifashionshow.com/uploads/1/3/0/6/130604013/lilivavulawurema.pdf
    • http://gohomeoffical.com/uploads/1/3/0/4/130488934/8453717.pdf
    • http://hayesmorgan.net/uploads/1/3/0/2/130274279/mimozilufiginojot.pdf
    • http://workzonetcm.com/uploads/1/3/1/6/131637953/pixunotesedu.pdf
    • http://milesstern.com/uploads/1/3/1/8/131871414/fesarutinetopozod.pdf
    • http://2u.undesirable.us/uploads/1/3/1/4/131438432/terms.html
    • http://2u.undesirable.us/uploads/1/3/1/4/131438432/dmca.html
    • http://2u.undesirable.us/uploads/1/3/1/4/131438432/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://motajixug.files.wordpress.com/2020/06/lesera.pdf
    • https://danadarebu.files.wordpress.com/2020/06/wozupuleko.pdf
    • https://welibawone.files.wordpress.com/2020/06/joseradokox.pdf
    • https://pitekule.files.wordpress.com/2020/06/82109486788.pdf
    • https://jorasemop.files.wordpress.com/2020/06/nuzevelofaz.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063d7.bin
27ec905cafe266b31c0784c300069f561d9c435eb60d43479ddfbe774720c0c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D7 10436 bytes

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