Malicious PDF — malware analysis report

Static analysis result for SHA-256 64cade6dc161817e…

MALICIOUS

PDF

38.1 KB Created: 2020-04-09 11:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bf91b6b18fdd8c40b385856789c49917 SHA-1: d0de381707f6dbdd75e2ce0759cb0f898d630bc4 SHA-256: 64cade6dc161817ebf99ebf403860e6f91c2b088cfc25d91497864d31d728bca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links to external websites, many of which appear to be part of a link farm. The primary lure is a fake driver download for a Canon printer, which is likely a pretext to direct users to malicious content. The ML classifier strongly indicated maliciousness, and the structure suggests a tactic to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://nycsummermusic.com/uploads/1/3/0/8/130813701/130813701.html#canon+mf4350d+driver+download+for+windows+10+64+bit
    • http://tulasienterprises.in/uploads/1/3/0/2/130271094/1e22fbf10.pdf
    • http://notostraws.com/uploads/1/3/0/2/130270938/9151132.pdf
    • http://immigrationlawleadsnow.com/uploads/1/3/1/3/131398411/3538432.pdf
    • http://advancedlimestone.com/uploads/1/3/1/1/131164272/boviforo-xixope.pdf
    • http://intext.london/uploads/1/3/0/8/130814630/biwazekazosoza.pdf
    • http://wabikonlakecabins.com/uploads/1/3/0/8/130814576/bobowuxokixebekiso.pdf
    • http://mcleanjesse.com/uploads/1/3/0/6/130620957/zeziforomeliku-velotejodi.pdf
    • http://myloilty.com/uploads/1/3/0/8/130874018/sizevowuvufefotilu.pdf
    • http://geosynoptics.ca/uploads/1/3/0/7/130738943/2a2bc33a58db3.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_off000069f9.bin
04cd6182c63cce441370ed705c18b02d6eb8d0f804da21efddcfe953d66ed204		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F9 8148 bytes

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