Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c7dbb9a7d19d94…

MALICIOUS

PDF

36.5 KB Created: 2020-03-19 10:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 65e90de4d9116ec6eb2e9745696a5444 SHA-1: 539b65d5ae7883778a6ebbf4553bd560663c09d1 SHA-256: d2c7dbb9a7d19d94d180ed50db9692923e9a47793d104b731ecc42baf47913dd
62 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files with numeric or generic slugs, indicative of a link farm. The document body mentions a 'Celsius into fahrenheit calculator', which appears to be a lure to encourage clicks on these links. The primary heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is the intended behavior. No scripts were extracted from this sample.

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://marengineering.net/uploads/1/3/0/6/130640066/130640066.html#celsius+into+fahrenheit+calculator
    • http://loveexperiments.com/uploads/1/3/0/8/130874658/3702346.pdf
    • http://richmondhouseclay.com/uploads/1/3/0/8/130814492/panibar_xorojujepozizew_navodipar.pdf
    • http://mylsathouse.com/uploads/1/3/0/6/130639626/1170432.pdf
    • http://godblessmeghan.com/uploads/1/3/0/2/130273738/509827.pdf
    • http://decisionagronomics.com/uploads/1/3/0/5/130540714/pobijinusuf-kuwurozapodawu.pdf
    • http://knownothingmom.com/uploads/1/3/0/4/130477719/nijetowu_bezifemedonom.pdf
    • http://incamamas.com/uploads/1/3/0/5/130590531/rebipakuj.pdf
    • http://phoenixatlbsa.com/uploads/1/3/0/4/130489969/kilokaxozipa.pdf
    • http://www.ryanbokehphotography.com/uploads/1/3/0/7/130775746/xenirirat_demad_papofo.pdf
    • http://psyflash.net/uploads/1/3/0/6/130604523/fovojop.pdf
    • http://drfranklinlevin.com/uploads/1/3/0/6/130604386/nuseravodise_puzazutazejiso_sokufemidodef_bufozusut.pdf
    • http://t5only.com/uploads/1/3/0/6/130604413/cf61c4d3980e0a7.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_off00006601.bin
c9ae05fdc7b24bfad1f6990578b1a0e146653af541bd9b80fcac2165fbb945c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6601 8000 bytes

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