Malicious PDF — malware analysis report

Static analysis result for SHA-256 4804f3e5d0b36f90…

MALICIOUS

PDF

43.0 KB Created: 2020-03-10 05:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7acae92bb9e0d2bb7909e252181f78de SHA-1: f43c529600011194b89b040b981d03dda66bb168 SHA-256: 4804f3e5d0b36f90b6c2ee1e780123c55825f07a7997be69fcd64d59ff9c9e93
62 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, indicating a link farm or SEO spamming attempt. The primary heuristic identified a large collection of external PDF links, suggesting the document's purpose is to redirect users to numerous other sites. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine a more specific user-facing lure.

Heuristics 3

  • 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
  • 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://74-123-72-53.mgwnet.com/uploads/1/3/0/9/130969403/130969403.html#f+test+anova+table+pdf
    • http://www.autoimmunejourney.org/uploads/1/3/0/5/130541950/vuwifixud.pdf
    • http://kristenfong.info/uploads/1/3/0/3/130323765/julowitinobo.pdf
    • http://mail.ryanbrownmusic.com/uploads/1/3/1/0/131070334/1021920.pdf
    • http://grasshoppersprings.com/uploads/1/3/0/2/130270985/vivimanurita.pdf
    • http://foreclosedtnhomes.com/uploads/1/3/0/5/130589198/fiwiz.pdf
    • http://valcom.tv/uploads/1/3/0/6/130622042/8597775.pdf
    • http://hostmaster.lula.site/uploads/1/3/0/6/130620966/9594747.pdf
    • http://writersink85.com/uploads/1/3/0/7/130739663/6635221.pdf
    • http://hillbillynationalbank.com/uploads/1/3/0/8/130813738/jetitekipeje-pubebizok-mewudidivibe-rugikoral.pdf
    • http://cardeocreative.com/uploads/1/3/0/7/130775047/23928813f78386.pdf
    • http://vreedy.shop/uploads/1/3/0/7/130739128/c1fbec52.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072d9.bin
81853efcad072664b4382a4188be49b0375bb4a6c019ef312ef81fd40d4c9976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D9 8520 bytes
font_01_sfnt_off000093ba.bin
ccd4c16be78461455bc416a6b2a82209edd949535a8ea342684372e9e7370a0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93BA 2736 bytes

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