Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2cd29716f89cdcf…

MALICIOUS

PDF

51.6 KB Created: 2020-04-06 11:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 02a577dfaeb13d04fd6d911946d3b0b1 SHA-1: a325ca4e0679129126ef290536e4deabd2de3f75 SHA-256: b2cd29716f89cdcfc4e3b006fc07a3c2267a32ce5d2b881b498ca2ce71f9f9c3
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on different domains. This behavior is indicative of a link farm or SEO poisoning tactic, designed to drive traffic to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://turner-vr.com/uploads/1/3/1/3/131379373/131379373.html#attack+on+titan+16.5
    • http://tecnologikasistenciatecnica.com/uploads/1/3/0/5/130589044/f11cec3b8b3.pdf
    • http://doctorforconcreteics.com/uploads/1/3/1/3/131380618/545234.pdf
    • http://promaganza.com/uploads/1/3/0/7/130775786/gejesiweki.pdf
    • http://ctyibius.org/uploads/1/3/0/7/130776263/negivigel_gusumula_duwatenipaziz_mokemo.pdf
    • http://alltypedriveways.com/uploads/1/3/0/5/130539446/b7c4ee870e95f7.pdf
    • http://emmajamesboutique.shop/uploads/1/3/0/2/130271137/dusefaziwujugonefufu.pdf
    • http://education-cannabis.com/uploads/1/3/0/2/130288520/mubove.pdf
    • http://pnebooks.blog/uploads/1/3/0/5/130539129/kifex.pdf
    • http://greenlightediting.com/uploads/1/3/0/5/130550775/petaliva.pdf
    • http://youdeservetheplanet.com/uploads/1/3/0/6/130604882/6402220.pdf
    • http://kvardek.com/uploads/1/3/0/7/130739538/zatusibitelikik-jemilikukewi-kaduxisemutuka.pdf
    • http://absystemsllcscam.com/uploads/1/3/0/7/130775828/zoxiw.pdf
    • http://eattheseed.com/uploads/1/3/0/5/130588282/jaduferes.pdf
    • http://endearcare.org/uploads/1/3/0/6/130639630/2bd7ca06126.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085a3.bin
d44d07dacac0cab057c07bf5b160d4f8cfba995bfe00779cfc0aa2fe4ad043a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A3 9528 bytes
font_01_sfnt_off0000a73a.bin
14b6d81cf12ba93fa7c0a7fb3918993173fadae8ce57f282deefe97dff317496		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA73A 4980 bytes
font_02_sfnt_off0000b735.bin
beb27d1f1815a7ce6b8569c591a247684861a3257630df3b368faf56f59ca8f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB735 2636 bytes

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