Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f7d4337e7df88d…

MALICIOUS

PDF

45.9 KB Created: 2020-04-08 05:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7be47a311748bbdd0d8ad44f9abfd7ae SHA-1: 0b769e1230df1fcf1ec2c54107434b0146151e26 SHA-256: 52f7d4337e7df88d625c0568a0277efb9286acb6c603cc021e621d6ece7a6292
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains, suggesting a link farm or SEO abuse tactic. The primary heuristic indicates a PDF URI pointing to 'dfashionfix.com', and another heuristic flags a mass of external PDF links originating from 'multitudinous.net'. No scripts were extracted from this sample. The document body is heavily obfuscated and contains the same URLs found in the heuristics.

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://dfashionfix.com/uploads/1/3/0/7/130776401/130776401.html#historical+romance+damsel+in+distress
    • http://multitudinous.net/uploads/1/3/0/4/130483507/pefipib-musazab-gefikope-bamatubuxira.pdf
    • http://adriennemilan.com/uploads/1/3/1/3/131380609/8135695.pdf
    • http://mailliesemp.com/uploads/1/3/0/9/130969945/levitujoteda.pdf
    • http://conchitalucas.com/uploads/1/3/0/6/130605017/294034.pdf
    • http://driversed.club/uploads/1/3/1/4/131453808/vobewidinejunak.pdf
    • http://rursus.lv/uploads/1/3/0/7/130738758/bimidideko.pdf
    • http://trulytough.com/uploads/1/3/0/3/130312914/fe755f608652.pdf
    • http://vasudha-wellness.com/uploads/1/3/0/5/130540874/9b6a94087cc08.pdf
    • http://frankyabundes.com/uploads/1/3/0/8/130814914/9641cd8fcda0c.pdf
    • http://ramoselectricalservices.com/uploads/1/3/0/2/130270843/68cd188092da100.pdf
    • http://thepantrytuscola.com/uploads/1/3/0/2/130289345/7082cc7e4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000751e.bin
a35b05d2d2b92dcbb983be0498f1aa145372c40be607931513723157d8890beb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751E 7876 bytes
font_01_sfnt_off000093f7.bin
ddc6c38a5929b263b215a5b0c7aa8b1a409f146866f06980111f9f21a6232bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93F7 16036 bytes

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