Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c11d462dad349f…

MALICIOUS

PDF

37.4 KB Created: 2020-04-06 04:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: aef46620df6668755e72924069152b53 SHA-1: 8e4f3d876d2acdd89d7352a1372fe09ed5f3bd37 SHA-256: 20c11d462dad349fcb922383928e378f0a472818f9fe5d4bf5b70b98733686ef
92 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body text, though partially corrupted, includes a URL that matches one of the extracted links. This suggests the primary malicious function is to direct users to a network of linked pages, likely for SEO spam or to host further malicious content. No scripts were extracted from this sample.

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://anipa.org/uploads/1/3/0/2/130273761/130273761.html#busqueda+por+cuenta+catastral+seduvi
    • http://professionalskinstation.com/uploads/1/3/0/6/130621944/9e852c3.pdf
    • http://nataliekopitzke.com/uploads/1/3/0/6/130639831/mefipitigera.pdf
    • http://oliveiraenterprise.com/uploads/1/3/0/6/130639467/042cb7fc92eb4a.pdf
    • http://wandordevelopmentassociation.org/uploads/1/3/0/3/130323581/vafamakamagirofasus.pdf
    • http://parenteducationcentre.com/uploads/1/3/0/2/130288864/7637735.pdf
    • http://trachtentwist.de/uploads/1/3/0/5/130551567/daf6c0.pdf
    • http://noblevisioncenter.net/uploads/1/3/0/6/130621328/pupirobudisisu.pdf
    • http://artofburkinafaso.com/uploads/1/3/1/4/131410939/sesunizok-vedetusuta-sofulabadi.pdf
    • http://itsasherrthing.com/uploads/1/3/0/6/130604541/6824817.pdf
    • http://cbb4life.org/uploads/1/3/1/3/131378942/bamofu-pekit-ripati.pdf
    • http://edenwoodranchandpreserve.com/uploads/1/3/1/4/131406695/9c20f0c6.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_off000066d4.bin
552b35bdcf73c7254ec6c5271e220ae0006868455060e32ea4397b537ef7e624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D4 8932 bytes

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