Malicious PDF — malware analysis report

Static analysis result for SHA-256 6447db6a2389228b…

MALICIOUS

PDF

36.8 KB Created: 2020-04-13 07:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 98f98ec0017e1b7c0fd132b4eed8b527 SHA-1: b38077c7bd7d82fbf520a77c87cdc55c16b768ad SHA-256: 6447db6a2389228b21d4b381653a1ec4f70287c5f659723240cdf1a1d380f285
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to seemingly unrelated domains and are structured as SEO-optimized PDF files. The document body, though heavily obfuscated, contains a URL that appears to be a lure for industrial sewing machine prices. This indicates a likely link farm or SEO manipulation tactic designed to drive traffic to potentially malicious or ad-filled websites.

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://findfitnessnj.com/uploads/1/3/0/5/130543878/130543878.html#juki+ddl+8700-7+price
    • http://craftsbytheriver.com/uploads/1/3/0/8/130814076/xoneruxuteduni.pdf
    • http://caroljensenfeltart.com/uploads/1/3/0/7/130739885/kunifenarapi.pdf
    • http://reachingthemasses.net/uploads/1/3/0/6/130620871/7973436.pdf
    • http://gettapped.xyz/uploads/1/3/0/6/130639962/c1b869.pdf
    • http://hrhfilms.com/uploads/1/3/0/3/130324158/renik_jedatal_zekarumivekasox_darewuzapiriwe.pdf
    • http://o-c-popcorn-seasonings.com/uploads/1/3/0/6/130639929/4b049f3a249.pdf
    • http://caromcorner.com/uploads/1/3/0/3/130323266/devivujusuratap.pdf
    • http://marie4trustee.com/uploads/1/3/1/6/131606208/6576178.pdf
    • http://windsolarleaseattorney.com/uploads/1/3/0/6/130621569/4192567.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_off00006603.bin
9a4c9e2391ca6840b3559088401ec107bf72abe47b6014819ee82fade81e364d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6603 8736 bytes

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