Malicious PDF — malware analysis report

Static analysis result for SHA-256 473184e89f58582d…

MALICIOUS

PDF

43.7 KB Created: 2020-04-10 02:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9b8cefbcb405b00400e0227c72ecf4ca SHA-1: 997f5bd18f4d63e1899963a91f424f8531ccd9b3 SHA-256: 473184e89f58582dadfdab9e768f34173c337b953c26e2fe1a4eec4d89013f44
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs on SEO-optimized domains. This behavior is indicative of a link farm or a traffic redirection scheme. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, and the document body was largely unreadable, making it difficult to determine a more specific payload or purpose beyond link distribution.

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://ruthcampbell-paintings.com/uploads/1/3/0/7/130740258/130740258.html#vehicle+maintenance+log
    • http://go2businessresource.com/uploads/1/3/0/4/130435624/94563.pdf
    • http://perfect-customrims.com/uploads/1/3/0/7/130775685/7520244.pdf
    • http://communityphysiciansmedical.com/uploads/1/3/1/4/131407945/fofesarufoba.pdf
    • http://commasandcurves.com/uploads/1/3/0/6/130639899/sibogejejev.pdf
    • http://minnocare.com/uploads/1/3/0/4/130476150/guruwalof.pdf
    • http://ideallionaire.org/uploads/1/3/1/4/131454932/gikobuz_zenodasi.pdf
    • http://midnightjusticefilms.info/uploads/1/3/1/3/131379361/fewafopanenazi-ginufaliruk.pdf
    • http://prologenics.com/uploads/1/3/1/0/131070560/5b44aeb558.pdf
    • http://cassieg.net/uploads/1/3/0/4/130483499/xidewus_samutu_nilikibalugi_wegotome.pdf
    • http://hardwoodfloorinspections.com/uploads/1/3/0/9/130969481/fae26cd33d43f.pdf
    • http://collaborationobject.com/uploads/1/3/1/3/131380788/gejofoderawa.pdf
    • http://laurafrasca.net/uploads/1/3/1/3/131398094/sajarijixipa.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_off0000824d.bin
3d7c0a9baad0cbe3696ee5115745d47d0d295d92b32e3d703f17489480a20f27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x824D 7752 bytes

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