Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76d7bdff46a87ef…

MALICIOUS

PDF

35.6 KB Created: 2020-06-07 23:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75191c5f4b4526124d771ed1bacc8390 SHA-1: ca50e2f105dc9b6e8ca4e880e8522b2ee1bba867 SHA-256: a76d7bdff46a87ef5080f0120390b4fdc125156ebffe4100f682af503d48367f
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 to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO manipulation tactic, which can be used to distribute malicious content or improve search engine rankings for malicious sites. The document body itself is largely unreadable, but the presence of numerous external links is the primary indicator of malicious intent.

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://4h9.undesirable.us/uploads/1/3/0/6/130604716/130604716.html#exerc%25C3%25ADcios+resolvidos+poliedros+pdf
    • http://toddandheathergetmarried.com/uploads/1/3/0/7/130739982/wojuvepibifa-kavifetaworuto-nunopes-jodov.pdf
    • http://trevorjamesgill.com/uploads/1/3/0/2/130272333/xuritumip.pdf
    • http://oginnovate.com/uploads/1/3/1/4/131407867/ec52fba28.pdf
    • http://prospectplumbingandgas.com/uploads/1/3/0/6/130640144/magoleda_gogivipiv_zevetajilixi.pdf
    • http://ginnycusack.com/uploads/1/3/0/5/130590432/zinir.pdf
    • http://liwen-tian.com/uploads/1/3/1/4/131409546/fadadagobanaw-wamagurobonew-reduju.pdf
    • https://xewugof.files.wordpress.com/2020/06/mirufofixugajelaxiranoj.pdf
    • https://jezovuri.files.wordpress.com/2020/06/vononelikoxu.pdf
    • https://gipiwes.files.wordpress.com/2020/06/bovagolafefogadu.pdf
    • https://dotuwapifufe.files.wordpress.com/2020/06/3166891136.pdf
    • https://bewisati.files.wordpress.com/2020/06/gefijetodenikozizojiso.pdf
    • https://saziwiri.files.wordpress.com/2020/06/93418335713.pdf
    • https://melixuv.files.wordpress.com/2020/06/dezim.pdf
    • https://xakisujufo.files.wordpress.com/2020/06/kurabuzigodufuki.pdf
    • https://susulalite.files.wordpress.com/2020/06/jamibuxuzadalilumodag.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_off00005ac4.bin
0a9577ffc1119d723ef28f7d893dd8759929ad13d4d14dfb4d844df981adcc7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC4 12312 bytes

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