Malicious PDF — malware analysis report

Static analysis result for SHA-256 af637b8b4c94cd51…

MALICIOUS

PDF

57.9 KB Created: 2020-04-21 10:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 85cd13829c5b3aaeb648159299555cc2 SHA-1: 678d36a6d2e572e114173e2c5df95612f93d4b64 SHA-256: af637b8b4c94cd51fd806089a64e6647e58b394d09fcb0061f85ba465598e5e1
62 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 as a "link farm" heuristic. The document body text is largely unreadable, but the presence of numerous links to other PDF files suggests a tactic to manipulate search engine results or to host further malicious content. The primary URLs extracted are likely part of this scheme.

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://keatingphysicaltherapy.net/uploads/1/3/1/4/131438456/131438456.html#please+be+guided+accordingly+meaning+in+english
    • http://cs-dry.com/uploads/1/3/0/8/130813301/zejeneba.pdf
    • http://bistro46.net/uploads/1/3/0/8/130874283/nilademe.pdf
    • http://studioardennes.com/uploads/1/3/0/7/130776716/zawowipalavip-desemiretunen.pdf
    • http://sattvayogaatx.com/uploads/1/3/0/6/130639357/xijizasuzudosujobag.pdf
    • http://goodkidsautismfoundation.org/uploads/1/3/0/6/130605506/4046378.pdf
    • http://bridgetdoherty.ca/uploads/1/3/0/4/130490774/wapubif.pdf
    • http://msldtinstitute.com/uploads/1/3/0/6/130604040/8128293.pdf
    • http://bakemydayarizona.com/uploads/1/3/0/5/130546244/detomakiderixira.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_off0000bbe6.bin
236b89da089efdb49e284847b31e45d733f69233277798e6375d23f8b61b9911		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE6 8564 bytes

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