Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8167dcb2f98d4b7…

MALICIOUS

PDF

41.9 KB Created: 2020-04-19 07:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 719d8207899aa586ffd51f80523506d4 SHA-1: 5be0e35bc1ac444fd2377294cd720a3014650068 SHA-256: a8167dcb2f98d4b7153d1430d3db7b0c9862961aab6fb55e1624d5acc5ce6412
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, identified by the PDF_SEO_LINK_FARM heuristic. The document body text, though partially corrupted, mentions 'Ptcb exam questions and answers pdf', suggesting a lure to trick users into visiting these links. The primary intent appears to be SEO spam or directing users to potentially malicious content 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://hostedcontacts.com/uploads/1/3/0/6/130640019/130640019.html#ptcb+exam+questions+and+answers+pdf
    • http://fordefinancialservices.com/uploads/1/3/0/6/130621498/0a4e5b9528a0.pdf
    • http://flahomebuyers.net/uploads/1/3/0/8/130874163/rakinuk_noxemagopamodal_dokakexune.pdf
    • http://fishinglifejacket.com/uploads/1/3/0/4/130488322/bobovikigaxixirugaza.pdf
    • http://1949oam.com/uploads/1/3/0/4/130483614/vodefupupituza.pdf
    • http://95rebar.com/uploads/1/3/0/3/130324047/537cd5e38d7.pdf
    • http://carolsmasal.com/uploads/1/3/0/5/130543198/7a84d838e63a5.pdf
    • http://thegrannychannel.com/uploads/1/3/0/5/130551944/2e96123ca8f.pdf
    • http://xtremeretirement.org/uploads/1/3/0/7/130740536/7029094.pdf
    • http://opsatlas.com/uploads/1/3/1/4/131453735/9954072.pdf
    • http://haddiepiephotography.com/uploads/1/3/0/8/130814584/9524617.pdf
    • http://the7thday.life/uploads/1/3/1/4/131437106/b063429aa5434f.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065a1.bin
81142bf193c85cad1469891fc6ddd181703028ba9fb5e3ef60ba12fd1372540d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65A1 8392 bytes
font_01_sfnt_off000085cc.bin
45c39c4315a5d00962143d4102937301eb2649728d6de39b959633cfc30365c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85CC 16144 bytes

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