Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8408b421d5978f9…

MALICIOUS

PDF

40.8 KB Created: 2020-06-01 16:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7be3ad70f4acbba5a08f3172006a45d SHA-1: 79df88e13368dec52809ca7e24b984705e972e9b SHA-256: a8408b421d5978f9c90647fbe5a66ad898511b7d8dacbf24f5da7375d762ae46
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on unrelated domains and appear to be part of a link farm. The document body mentions 'Tag Heuer link watch manual', suggesting a lure to entice users to click on these links. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://dmwproductions.com/uploads/1/3/0/7/130776016/130776016.html#tag+heuer+link+watch+manual
    • http://clairemcgrathfitness.com/uploads/1/3/0/7/130776719/pupenomagito.pdf
    • http://laurystiscak.org/uploads/1/3/0/3/130313178/vowowojiredu.pdf
    • http://fmg-goldau.ch/uploads/1/3/0/5/130539875/f99625aeddaba8.pdf
    • http://paramountplumbingservices.net/uploads/1/3/1/4/131453096/diweke.pdf
    • http://2a5.undesirable.us/uploads/1/3/0/5/130588168/87a63d.pdf
    • http://southwestvfd.com/uploads/1/3/0/2/130271244/leseduroj.pdf
    • http://musclemanproductions.com/uploads/1/3/0/5/130546040/gufov_retumaxolerene_nusaxaxalunonuj_duzaxaril.pdf
    • http://personaly.nl/uploads/1/3/0/8/130874566/1299357.pdf
    • http://dmwproductions.com/uploads/1/3/0/7/130776016/terms.html
    • http://dmwproductions.com/uploads/1/3/0/7/130776016/dmca.html
    • http://dmwproductions.com/uploads/1/3/0/7/130776016/policy.html
    • https://dasawiduved.files.wordpress.com/2020/05/bedaj.pdf
    • https://fokofalur.files.wordpress.com/2020/05/58254163866.pdf
    • https://mumovafixax.files.wordpress.com/2020/05/pesirewadi.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_off000074ff.bin
a26d4aaa90c20daf47b2a82a7dbb90b04cd648d7902dcc6304b3ca4d1166d489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FF 10308 bytes

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