Malicious PDF — malware analysis report

Static analysis result for SHA-256 4734edf4d832a42c…

MALICIOUS

PDF

38.1 KB Created: 2020-04-06 14:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 31f5dd6acb5103f4973dc5c13d9a6f76 SHA-1: aa0f256f38fb7f1708525ef52693469bc5c18b6b SHA-256: 4734edf4d832a42c056146f16770fecca731e63fe6273157a8bafb8fbd196835
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains the phrase 'Claires uk ear piercing' and references the authoring application, suggesting a lure. The primary goal appears to be directing users to a network of websites, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://rehphotography.org/uploads/1/3/0/3/130379363/130379363.html#claires+uk+ear+piercing
    • http://southeasternaerialimaging.com/uploads/1/3/0/5/130589299/9644945.pdf
    • http://annikasyogabubbla.com/uploads/1/3/0/6/130639073/4296709.pdf
    • http://flavorness.com/uploads/1/3/0/4/130478520/8f5245e607df4.pdf
    • http://thomasvasasphotography.shop/uploads/1/3/0/7/130776656/9168365.pdf
    • http://robinblisard.com/uploads/1/3/0/6/130605383/gasovesul_xefutewidotur_fesetibip_darisi.pdf
    • http://dtapto.org/uploads/1/3/1/4/131438274/8736358.pdf
    • http://price-loto.site/uploads/1/3/1/0/131070858/c544b6.pdf
    • http://thebarbazaarseattle.com/uploads/1/3/0/7/130776573/ecf2719aa.pdf
    • http://fastsecurity.eu/uploads/1/3/1/1/131164448/jufeles_gadelubaxu_sewowumo.pdf
    • http://celebritysmilenorwich.com/uploads/1/3/0/8/130814933/cf8662.pdf
    • http://justcurious.info/uploads/1/3/0/6/130604065/mosowuzopa.pdf
    • http://employerparadise.org/uploads/1/3/0/5/130588651/rodinuxaka_marake_vewatori_zedesa.pdf
    • http://neurotherapycenterva.com/uploads/1/3/0/6/130640111/nolekixu.pdf
    • http://redwood-mc.com/uploads/1/3/0/6/130604441/pupazemodesavev_makim.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_off00006d16.bin
5d046822a9e9a47be192d494664f7ef2a10c65df411cddfb8cd276f532b8a70f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D16 7808 bytes

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