Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fda879cc8a01c53…

MALICIOUS

PDF

44.7 KB Created: 2020-03-22 02:15:22 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ac4a71fb909135d0eadcbcd79f6526ad SHA-1: 471740de0ce9292f777f8c309354d94a88ad4c86 SHA-256: 4fda879cc8a01c535b4c4bb4ea8e55d9ac43c2ed92138f7aaf35ab469e42a1e0
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to a network of linked websites, likely for SEO manipulation or to serve as a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://harperlane.org/uploads/1/3/0/3/130313529/130313529.html#excepciones+de+los+articulos+indefinidos+en+ingles
    • http://cgstemhub.net/uploads/1/3/0/3/130313153/1974541.pdf
    • http://gasryanltd.com/uploads/1/3/0/2/130271206/migimiza.pdf
    • http://rollatropicalsno.com/uploads/1/3/0/6/130604583/2a8dddfd5d08.pdf
    • http://stressfreemove.net/uploads/1/3/0/8/130813765/687161.pdf
    • http://beyoutiful.ca/uploads/1/3/0/4/130483710/4f38edd4.pdf
    • http://www.pinkyminkcollection.com/uploads/1/3/0/8/130813667/36a3a03bd.pdf
    • http://www.staywhole.net/uploads/1/3/0/4/130476691/guloselozowor.pdf
    • http://www.skadooshdance.com/uploads/1/3/0/3/130379142/56ce98639f027e7.pdf
    • http://www.etrealamode-boutique.com/uploads/1/3/0/3/130324004/gekozofuxozi.pdf
    • http://laruelawoffice.com/uploads/1/3/0/5/130548152/kozakisa.pdf
    • http://rockcliffetennis.ca/uploads/1/3/0/7/130776152/ed2ee1e90880.pdf
    • http://kencoleman.co/uploads/1/3/0/5/130589194/fojepitobidasur.pdf
    • http://julienhauss.com/uploads/1/3/0/5/130544379/burefub.pdf
    • http://vadeferias.com/uploads/1/3/0/4/130488252/4990540.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_off000081a8.bin
0cef6f12c2baaf2cfaa31a1caab6564cb51a72ec7dd47ea5626eb409e3526009		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A8 9456 bytes

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