Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c38cea60be53389…

MALICIOUS

PDF

39.6 KB Created: 2020-03-12 03:51:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d7f73cbca272024e201f47578f345a9b SHA-1: 6e221585e876b9f9baddc6644764ff2168e8a11f SHA-256: 6c38cea60be533892012c637e709b24e18e6565205cc69790e50967f60f0c203
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which are structured as SEO-optimized URLs pointing to other PDF files. The document body text, though partially corrupted, includes a URL that appears to be a lure for users seeking information on inserting PDF files into Word. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for malicious purposes, such as distributing malware or phishing content through these linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://www.twotimetackandfeed.net/uploads/1/3/0/3/130323709/130323709.html#insert+pdf+file+to+word+2016
    • http://www.normexconsultores.com/uploads/1/3/0/6/130604306/domutaniku.pdf
    • http://hyjinx-rally.com/uploads/1/3/0/9/130969899/7588613.pdf
    • http://www.journeyyoga.ca/uploads/1/3/0/8/130814219/5443927.pdf
    • http://miltonmurray.org/uploads/1/3/0/6/130639590/3189525.pdf
    • http://www.team.ccioh.com/uploads/1/3/0/4/130435988/pukeni-zurusufaj.pdf
    • http://avneetbansal.com/uploads/1/3/0/6/130604241/1c36ab.pdf
    • http://prypost.com/uploads/1/3/0/6/130604986/8839030.pdf
    • http://brokerfraud.org/uploads/1/3/0/5/130550888/9577869.pdf
    • http://4gkingdomliving.com/uploads/1/3/0/2/130288421/xitujeduxipajamaf.pdf
    • http://cpanel.rellaworks.com/uploads/1/3/0/3/130379428/0e566379fbda.pdf
    • http://mta-sts.magalyponce.com/uploads/1/3/0/6/130603892/a93ae14d028a.pdf
    • http://imaniashante.com/uploads/1/3/0/5/130551142/f4f8e2743c6.pdf
    • http://myezpzpay.com/uploads/1/3/0/7/130776219/xomusegad.pdf
    • http://goeswithmycouch.com/uploads/1/3/0/4/130477372/e4f687e7f.pdf
    • http://my-veterans.com/uploads/1/3/0/4/130488565/4d4086.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_off0000727e.bin
62dc23698da39cdbfa33ad0eb93c412e84a7add944571e6a0883da9a01869187		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727E 7868 bytes

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