Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ecfaa3c145cdfb…

MALICIOUS

PDF

41.2 KB Created: 2020-03-15 01:08:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 43353151e69b977eb58559afd4625982 SHA-1: 172ed7ba5ad6f1bfcc6cd5f2fb055fdd0e96acdd SHA-256: e7ecfaa3c145cdfb40b3db42060c0d7913984f3234e99c6495cf6b3f1f798990
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though partially corrupted, suggests an educational context ('Answers of ch1 history class 9') which is likely a lure. The primary heuristic identified a link farm, indicating a coordinated effort to distribute malicious content via numerous URLs.

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://74-123-76-227.mgwnet.com/uploads/1/3/1/0/131070521/131070521.html#answers+of+ch1+history+class+9
    • http://niqsstudioofluxury.com/uploads/1/3/1/0/131070459/0bd7d70a777.pdf
    • http://mail.integrity-networks.net/uploads/1/3/0/6/130639745/pixixezetejanukivus.pdf
    • http://healwiththerapy.com/uploads/1/3/0/6/130605204/fudake.pdf
    • http://lampeelife.com/uploads/1/3/0/7/130775355/199a09f61de6939.pdf
    • http://blindsquirrelcreativedesign.com/uploads/1/3/0/6/130621941/879524.pdf
    • http://legacyparenting.today/uploads/1/3/0/7/130739454/05d4f5288b96d0.pdf
    • http://www.neilsalem.com/uploads/1/3/0/2/130291545/zibakeda.pdf
    • http://artsanimalsandawakenings.com/uploads/1/3/0/4/130476747/pewenibuxi.pdf
    • http://michaelmuellerfood.com/uploads/1/3/0/7/130739251/9219814.pdf
    • http://pmgfiletransfer.com/uploads/1/3/0/3/130379271/xuzixinoz.pdf
    • http://www.joelmcdermott.uk/uploads/1/3/0/5/130543653/nufuboliwisod.pdf
    • http://pineapplecoffeeandtea.com/uploads/1/3/0/5/130588650/080242bf4d3.pdf
    • http://mathematicsreform.com/uploads/1/3/0/5/130543264/5927299.pdf
    • http://www.chesapeakeandhudson.com/uploads/1/3/0/7/130739810/5631289.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_off00007858.bin
f9443c2e53bb4d066672ea7310b6bc03abed81bd26c0f075d417486aeff9a618		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7858 7928 bytes

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