Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b37c82b4b378763…

MALICIOUS

PDF

48.6 KB Created: 2020-04-20 00:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 48e17f6737fc78c00151d6793e68eefc SHA-1: c8b57f99e9041799bf3e5dae1e2e890f01e32d6e SHA-256: 3b37c82b4b378763a7e69f90d955e96da5c55082103fc41e66a6ea0cb7dee86b
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on newly registered domains and appear to be part of a link farm designed to improve search engine rankings. The document body text, though heavily obfuscated, contains a reference to 'Whatsapp apk for android', suggesting a lure to trick users into visiting these malicious links. The primary attack pattern involves directing users to a network of potentially malicious PDF files hosted on various domains.

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://coronamaskmap.com/uploads/1/3/1/3/131379397/131379397.html#whatsapp+apk+for+android+2.+3+6
    • http://chateauvaudreuil.ca/uploads/1/3/0/5/130545827/4763109e4.pdf
    • http://pcftinstruction.com/uploads/1/3/0/8/130813834/9488029.pdf
    • http://arkabargrazing.com/uploads/1/3/0/6/130640023/fopukegelegawid.pdf
    • http://resourcefulmaven.com/uploads/1/3/0/4/130483167/a856326b602c65.pdf
    • http://pjsanimatedshorts.com/uploads/1/3/1/6/131636774/500704ad.pdf
    • http://zacharymetcalf.com/uploads/1/3/0/5/130551559/b88ea6ce4f.pdf
    • http://remotewurk.com/uploads/1/3/0/6/130620628/86f045a72b6b5e8.pdf
    • http://drglenngoldring.com/uploads/1/3/0/7/130739185/gokox-geleboxizekus-bodidasig-fafudefak.pdf
    • http://southshorecompanioncare.com/uploads/1/3/0/7/130739351/9a5ead613b786.pdf
    • http://annecroomart.com/uploads/1/3/1/4/131453927/9465123.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_off000094f7.bin
dd1499373609532deb7df1e7e432601d28a17c1ca08c71f058e08ea727fe52f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94F7 9348 bytes

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