Malicious PDF — malware analysis report

Static analysis result for SHA-256 743623b37cd3d551…

MALICIOUS

PDF

37.3 KB Created: 2020-04-04 13:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bb9539267ca47442aad988cc45acb61e SHA-1: 5d1a94be24eaa0c49db50590b839134430b51e4e SHA-256: 743623b37cd3d5517dee75fc83e88af7e7deff8ebaabce76fbe6f70d0e93dc93
92 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external URLs pointing to other PDF documents hosted on various domains. The ML classifier strongly flagged this sample as malicious. The primary attack pattern involves directing users to a large number of external resources, likely for SEO manipulation or to distribute further malicious payloads.

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://murraywhiteley.com/uploads/1/3/0/4/130483572/130483572.html#libro+de+ciencias+naturales+6+grado+contestado+issuu
    • http://fittini.club/uploads/1/3/1/0/131069897/sikuxukinunesaba.pdf
    • http://porter-briggs.com/uploads/1/3/0/5/130544591/monitesovunub_lasoganule_saduxi_pedasanobesumil.pdf
    • http://keysandkids.com/uploads/1/3/0/9/130969405/wiliji.pdf
    • http://venuebleenterprises.com/uploads/1/3/1/1/131163867/zuvapax_zaxikoto.pdf
    • http://flipshopingmall.com/uploads/1/3/0/4/130483163/bd18e30b23.pdf
    • http://davidmcnicholas.com/uploads/1/3/0/3/130323814/sukuj_rixoxupe.pdf
    • http://vcorganicslv.com/uploads/1/3/1/1/131163914/03e19622.pdf
    • http://ionmhascapital.com/uploads/1/3/0/5/130547846/45959.pdf
    • http://nashvilleperformancepsych.net/uploads/1/3/0/4/130483745/sewinewif-dupojilaxemetip.pdf
    • http://greenville-treeservice.com/uploads/1/3/1/4/131483078/gututevujev.pdf
    • http://wildlynativeflowerfarm.us/uploads/1/3/0/7/130740558/4724317.pdf
    • http://winnerconsolidatedholdings.com/uploads/1/3/0/6/130605280/nibejosi.pdf
    • http://davidecabassichabas.com/uploads/1/3/0/7/130740566/6153000.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_off000067db.bin
1dd59af2e4063900fdd1957c96d3f951870547c92ca34bb1aa636323d3246aa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67DB 8260 bytes

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