Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a75e7fec2f1c97…

MALICIOUS

PDF

53.5 KB Created: 2020-04-27 02:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2d4df6eff6c2f470091133d00f7598fd SHA-1: bd3c18bd2868ed4bbe4a06abf4b4da12466765b9 SHA-256: 32a75e7fec2f1c97af0bea508d3648934412cd3aaa474a3f2729b263c60c17c0
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, a common technique for SEO poisoning or redirecting users to malicious sites. The ML classifier strongly indicated maliciousness. The embedded URL points to a page that appears to be a lure, disguised as a technical manual, likely intended to trick users into clicking through to a compromised or malicious host.

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://representacoespicinin.com/uploads/1/3/1/4/131407647/131407647.html#carrier+air+cooled+chillers+manual+30xa
    • http://justwriteitdown.net/uploads/1/3/0/5/130588798/1954336.pdf
    • http://spiritualgardendesign.com/uploads/1/3/0/6/130621076/9114185.pdf
    • http://miawoof.fr/uploads/1/3/0/7/130775309/norevelek_bewikor_dukasavufimoj.pdf
    • http://efficientroofing.ca/uploads/1/3/0/7/130738759/mubekunef.pdf
    • http://desguacesdinar.com/uploads/1/3/0/6/130603776/33f74bb8ad282.pdf
    • http://garagedoorrepair-lynnwood-wa.com/uploads/1/3/0/6/130604487/siduxogel-kedobosuxita-lakave-ronunivur.pdf
    • http://karenldyson.com/uploads/1/3/0/3/130379243/8461519.pdf
    • http://mobilecardetailingsimivalley.com/uploads/1/3/1/4/131436991/9724187.pdf
    • http://mylesmccallum.com/uploads/1/3/1/3/131379999/vovuvebokakorike.pdf
    • http://omniaabdulqadir.com/uploads/1/3/0/7/130739633/gamusedudalipubokegu.pdf
    • http://indiegearhead.net/uploads/1/3/1/6/131637284/6996662.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_off0000ab62.bin
da47fb661d8813db561b05624897f5d1c5e6773be6d63cbfcae17d7f89eaf941		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB62 7900 bytes

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