Malicious PDF — malware analysis report

Static analysis result for SHA-256 3609fbd3c4d6897a…

MALICIOUS

PDF

45.4 KB Created: 2020-04-28 05:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0c4f5af4a2aba911ac51a0f64d2c8b8a SHA-1: 64137defb09ade1779eaeb25d5551d68bf38740a SHA-256: 3609fbd3c4d6897a44a8d49133e04faa1657e7df01e4c947640bebdbdd5dc476
82 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to seemingly unrelated PDF files hosted on various domains. One heuristic specifically flags this as a 'PDF_SEO_LINK_FARM'. Additionally, the document body contains text and a heuristic indicates a 'SE_CALLBACK_LURE', suggesting the user is prompted to call a phone number for a fake issue. The combination of link farming and callback lure points to a social engineering attack.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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://janisduncan.com/uploads/1/3/0/8/130874269/130874269.html#investor+guide+2018
    • http://lighthousejesusradiostation.com/uploads/1/3/1/3/131380320/af7ab74586f.pdf
    • http://average-adam.com/uploads/1/3/0/4/130476157/kapogomedome.pdf
    • http://sincerelycam.com/uploads/1/3/0/7/130739975/sopikinavizeg-tavekivu-tejexojawo.pdf
    • http://nuggets.space/uploads/1/3/1/3/131383821/napuk.pdf
    • http://tcrealtyinvestments.com/uploads/1/3/0/2/130272342/sajokemakimesu.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_off00008874.bin
aa66ba03fd34110dc3ed4b82c2c40534d781e21fa798cdb3e837f62b950ba3c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8874 9008 bytes

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