Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9549a59745d8900…

MALICIOUS

PDF

54.0 KB Created: 2020-06-19 02:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5df1e67e105181a5d24faa8ab62515d0 SHA-1: a6d5d3fbf740237019bdb04aeee0f1cc5674d5b9 SHA-256: a9549a59745d8900aa439df490cd9c375f97186ea4b79e44f9e03fd830ef8002
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO poisoning or to direct users to malicious content. The document body mentions 'pinched nerve exercises' to lure victims, while the embedded links lead to a link farm of other PDFs. The primary malicious activity observed is the hosting of a link farm designed to drive traffic to potentially harmful websites.

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://2yi.undesirable.us/uploads/1/3/1/4/131452814/131452814.html#c8+pinched+nerve+exercises
    • http://ns2.artsquarterbooks.com/uploads/1/3/0/5/130590321/vopatakadixenosu.pdf
    • http://kingvinil.es/uploads/1/3/1/3/131380146/pokaserebika_sakibaxip.pdf
    • http://snapshotsofwisdom.com/uploads/1/3/1/0/131071256/ea284.pdf
    • http://webdisk.moysmovies.com/uploads/1/3/1/8/131857445/tipop.pdf
    • http://decorativeconcreteminneapolis.com/uploads/1/3/1/6/131637942/6809570.pdf
    • http://hostmaster.saunaekeren.be/uploads/1/3/0/6/130639140/revenogejeno.pdf
    • http://hostmaster.costumeunderground.co.uk/uploads/1/3/0/5/130551559/1181918.pdf
    • http://nofone.net/uploads/1/3/1/6/131606331/6759693.pdf
    • http://tack.sbrsd.org/uploads/1/3/0/9/130969808/1e698.pdf
    • http://nomerounoi23.com/uploads/1/3/0/7/130775928/69d88837c7d.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_off0000993a.bin
d440a7905d87590d7571783bb0d83ad19461cf2f6fe9b8f2c4788ce280a74ba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x993A 4860 bytes
font_01_sfnt_off0000a9af.bin
bd17a84112ecc17e6036a47de9a42f620f300d9eea1438880c7cde3b0a6c17c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9AF 10304 bytes

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