Malicious PDF — malware analysis report

Static analysis result for SHA-256 7368e0d74ef383f6…

MALICIOUS

PDF

34.7 KB Created: 2020-03-16 03:53:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e86b5bacd6a67765fc20f86b934f68bb SHA-1: 759caf748cccfae3de48c7ab1769f401e9ce6b25 SHA-256: 7368e0d74ef383f6180802f5a725d0d7900c758a4bf3c1f2688f11338f8e633e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this sample as malicious. The embedded URLs suggest a link farm or content distribution network, likely intended to drive traffic or serve malicious payloads.

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://0pg4n.salon225.com/uploads/1/3/0/5/130551197/130551197.html#dance+songs+in+telugu+free
    • http://catavision2030.org/uploads/1/3/0/7/130739170/towufaze.pdf
    • http://www.bluebriqs.com/uploads/1/3/0/4/130477584/651066.pdf
    • http://cgccc.com/uploads/1/3/0/6/130605204/sibozemodet.pdf
    • http://goghom.com/uploads/1/3/0/6/130620796/c5c8c.pdf
    • http://www.richmondvatowing.com/uploads/1/3/0/5/130539899/e7c0805.pdf
    • http://www.aucklandhousesitting.com/uploads/1/3/0/4/130435596/9549450.pdf
    • http://emeraldzen.com/uploads/1/3/0/8/130874115/zelatewojofemufoxuf.pdf
    • http://expertaenvaciones.com/uploads/1/3/0/3/130313649/jipurapotajulokugake.pdf
    • http://natashacorriephotography.com/uploads/1/3/0/5/130540725/6060085.pdf
    • http://wainspection.com/uploads/1/3/0/6/130604113/1060486.pdf
    • http://v2leadership.com/uploads/1/3/0/2/130291328/f7dbe9780.pdf
    • http://blanketwhale.com/uploads/1/3/0/6/130604158/fobivepoji.pdf
    • http://www.humanrightspark.ca/uploads/1/3/0/6/130639493/7265388.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_off00006029.bin
609fddc89f7f8183391481ffa693ce310f190be2e896ee994bfc7e3d7e7a1bd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6029 7524 bytes

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