Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84d311f5e1c32e3…

MALICIOUS

PDF

32.9 KB Created: 2020-06-02 08:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a36a22f069054c491eea415df90128e9 SHA-1: 0ad9e6fc12edc8a6f201ab499d99cf4ca0da6c56 SHA-256: c84d311f5e1c32e35e26d17d22a9ae8e5a613bd8e6670a2bc69bcbddf3dae36e
92 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links, many of which point to other PDF files. The document body contains a mix of seemingly random text and URLs, suggesting it is part of a link farm or SEO spam campaign. The primary goal appears to be directing users to a network of external PDF documents, potentially to host malicious content or for search engine manipulation.

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://divinegrids.com/uploads/1/3/0/6/130605178/130605178.html#zenon+z3+full+movie+online
    • http://mta-sts.mx.usgtf-flc.com/uploads/1/3/1/4/131453633/9679987.pdf
    • http://yourhomeinto.com/uploads/1/3/0/7/130776678/mikavepebesal.pdf
    • http://speakwright.org/uploads/1/3/1/3/131380453/877e8.pdf
    • http://hutchautoaccessories.com/uploads/1/3/0/2/130288707/3626366.pdf
    • http://springs4houstongaragedoors.com/uploads/1/3/0/4/130475973/vufemefanuj.pdf
    • http://mainstreettroupe.com/uploads/1/3/0/8/130873801/zukitaf_daxafos.pdf
    • http://omegasdepartmentstore.com/uploads/1/3/1/3/131398278/pigadiriv.pdf
    • http://3guysautoanddetail.com/uploads/1/3/0/7/130739729/mefewi-defewafulagi.pdf
    • http://nrgsupply.ie/uploads/1/3/0/6/130620451/8774681.pdf
    • http://divinegrids.com/uploads/1/3/0/6/130605178/terms.html
    • http://divinegrids.com/uploads/1/3/0/6/130605178/dmca.html
    • http://divinegrids.com/uploads/1/3/0/6/130605178/policy.html
    • https://vipodujenij.files.wordpress.com/2020/06/kojogixeraxerolorame.pdf
    • https://wutapega.files.wordpress.com/2020/05/pasuv.pdf
    • https://metekaz.files.wordpress.com/2020/05/jafavumawed.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_off00005380.bin
9240a2612d09215eaa1efb8157ece27a6f2e2a6ba538e7b78e4110f67cb9ccf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5380 10732 bytes

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