Malicious PDF — malware analysis report

Static analysis result for SHA-256 25af26d8f6617fdd…

MALICIOUS

PDF

34.9 KB Created: 2020-05-23 18:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0347342eb44d9f139298da503db773e9 SHA-1: d36ab30ec67387ddc424d5fbbdefcc45251bf5f9 SHA-256: 25af26d8f6617fddb3e79fcbba2f9e78a744299da5ae2910375dfda9b1ab8dad
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains that appear to be part of a link farm. This suggests a tactic to manipulate search engine results or to distribute malicious content through seemingly innocuous links. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the ability to determine specific payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://homestagingprofessionaltraining.com/uploads/1/3/0/7/130776267/130776267.html#solla+sollew+seussical+jr
    • http://theweightworkshop.com/uploads/1/3/0/6/130640175/nexadavego.pdf
    • http://diabetesrelatedretinopathy.org/uploads/1/3/0/4/130483184/726ca123d.pdf
    • http://ohio-dogbite.com/uploads/1/3/0/7/130775821/guwawo_pakamabi.pdf
    • http://grayroncal.com/uploads/1/3/0/2/130273814/8824221.pdf
    • http://accountprojectchange.com/uploads/1/3/0/5/130540699/9201391.pdf
    • http://oandrpropertysolutionsllc.com/uploads/1/3/0/8/130873736/3938060.pdf
    • http://eudariclaw.com/uploads/1/3/0/4/130483370/raditaropol-zufaledi-gebopaj-saruloxosisolid.pdf
    • http://americanfamilygolf.us/uploads/1/3/1/6/131606183/4167625.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_off00005df2.bin
f1dbbf151c01a1b88354a16e3c970bb7fe85ff762ad378f7f7104cb7a7ee3bb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF2 10280 bytes

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