Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbef0e4698b85520…

MALICIOUS

PDF

35.6 KB Created: 2020-04-15 12:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 821a9b65fb1339d67c87d820c647e62c SHA-1: 803da27ca759809d946c31533effaef2d6845f00 SHA-256: fbef0e4698b85520df05d752feb250960540dfec4e85fd0d1e08ca72067c5971
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, many of which point to PDF files with numeric slugs, characteristic of SEO link farm techniques. One of the embedded URLs, http://sjhbfc.com/uploads/1/3/0/6/130604361/130604361.html#cpcu+online+study+guide, suggests a lure related to online study guides. No scripts were extracted from this sample. The primary attack vector appears to be directing the user to a malicious website via embedded links.

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://sjhbfc.com/uploads/1/3/0/6/130604361/130604361.html#cpcu+online+study+guide
    • http://bepita.ch/uploads/1/3/1/4/131407567/9765346.pdf
    • http://pinoyscoffeeboba.shop/uploads/1/3/1/3/131379198/26aec457e.pdf
    • http://thewarehousenyc.com/uploads/1/3/0/7/130739680/14e48e8d589.pdf
    • http://hanerlaw.com/uploads/1/3/0/3/130379135/30c360c538e52b.pdf
    • http://pursoofficial.org/uploads/1/3/0/2/130273753/pavofa.pdf
    • http://atlasaces.com/uploads/1/3/1/3/131398237/4503552.pdf
    • http://curiosityandwonder.org/uploads/1/3/0/5/130544078/2d7d6bb7320.pdf
    • http://coloquioespanacee1979-2019.com/uploads/1/3/1/6/131606331/xegoti_vobutidisoke_vubetufuniva.pdf
    • http://tabletsellingplus.com/uploads/1/3/1/4/131407045/6443355.pdf
    • http://thewarehousenyc.com/uploa
    • 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_off00006162.bin
eea22412a1dec95e141e0f889e79a0febfebf60bf26bc9819a1155a289c1b97c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6162 8704 bytes

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