Malicious PDF — malware analysis report

Static analysis result for SHA-256 00635267f036ad75…

MALICIOUS

PDF

42.3 KB Created: 2020-05-22 20:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5295ec1a3b011db6942ce1da42f7ea5 SHA-1: ec8d46cfd797ee89685eba8396b8306b612c39c4 SHA-256: 00635267f036ad753c663a99195dd6524da6a0f152f32afe1165cc1fc8dfb5da
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm designed to artificially inflate search engine rankings for terms like 'get civilization 3 free download'. The ML classifier strongly indicated maliciousness, and the embedded URLs point to potentially harmful content or further malicious redirects. The document body itself is heavily obfuscated but contains fragments of the lure text and URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://capitalconsultingact.com/uploads/1/3/0/7/130739561/130739561.html#get+civilization+3+free+download+full+game+pc
    • http://aussiewrestling.com/uploads/1/3/0/5/130542940/zutinusipefor.pdf
    • http://flirtyandfunbowsagesbyjennym.com/uploads/1/3/0/6/130620557/fdbe14dc0cbef.pdf
    • http://2cs.org/uploads/1/3/1/8/131857115/lerumupobowi-ratiwonewaxoze-fimotunarudede-pipijetof.pdf
    • http://vinandjill.com/uploads/1/3/1/4/131407021/7645659.pdf
    • http://africanhao.com/uploads/1/3/1/4/131438729/7554499.pdf
    • http://dorriecares.com/uploads/1/3/0/6/130621101/pujufuzarebediximufa.pdf
    • http://ericksontravel.net/uploads/1/3/0/4/130435666/5784185.pdf
    • http://kenwitwer.com/uploads/1/3/0/8/130874674/wipow_nabowonetu.pdf
    • http://silvestrilawpa.net/uploads/1/3/1/8/131860868/de5c4c578d94c.pdf
    • http://stanharrisconstruction.com/uploads/1/3/0/8/130874082/55e660a6c72ac.pdf
    • http://golddetectives.net/uploads/1/3/0/8/130874104/9398383.pdf
    • http://legionriskmanagement.com/uploads/1/3/1/8/131859895/tokibedew.pdf
    • http://sweetridersexpressllc.com/uploads/1/3/0/5/130550782/6021801.pdf
    • http://curtisacupuncture.com/uploads/1/3/0/6/130604350/8429188.pdf
    • http://andresbeatstore.com/uploads/1/3/1/4/131452732/wejesutisanetaj.pdf
    • http://paintedhandtattoo.com/uploads/1/3/1/3/131381693/roxifopusisu_zonikajaf_pawuxalexivubu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077cb.bin
2899b5d6f4dba4af71491ef79855b039b5a0c3d72156fcfbfb05ca6aebf2a669
pdf-font-stream PDF embedded font (sfnt) at offset 0x77CB 11116 bytes