Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb8e336a76a27920…

MALICIOUS

PDF

43.6 KB Created: 2020-03-21 16:32:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 256c2ffc00970849676a4e8ffcd71c7a SHA-1: 1ce3f6c7ace49037c4d854f1a2b81ce8c39b2cab SHA-256: eb8e336a76a27920e2dcb9400d6b84a2ed9b5f61c662296c70db709371d5c49e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body contains text related to CPU comparisons, which is likely a lure to disguise the malicious nature of the link farm. The primary attack pattern involves directing users to a large number of potentially malicious or spam-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://theovercomersblueprint.com/uploads/1/3/0/5/130550911/130550911.html#amd+fx+8350+wraith+vs+ryzen+3+1300x
    • http://greshambankruptcylawyer.com/uploads/1/3/0/7/130740414/kobabakusowekeb.pdf
    • http://cpanel.acombparish.org/uploads/1/3/0/2/130288316/1928230.pdf
    • http://the-kmg.net/uploads/1/3/0/8/130813651/d3c63ee75fe.pdf
    • http://gertieandruth.com.au/uploads/1/3/1/0/131070530/527488.pdf
    • http://moderndemure.com/uploads/1/3/0/5/130545278/1474278.pdf
    • http://gregwiser.com/uploads/1/3/0/3/130323425/kosetizagipiwojemezu.pdf
    • http://www.tricotchien.com/uploads/1/3/0/6/130620755/gigisumotironalatop.pdf
    • http://ohkayla.com/uploads/1/3/0/6/130620659/telegepexomes.pdf
    • http://minnesotaprayerhotline.org/uploads/1/3/0/7/130776763/65977f54c.pdf
    • http://indmusicnetworks.com/uploads/1/3/0/5/130539843/b2db135c0daf57.pdf
    • http://vegefullvybez.com/uploads/1/3/0/7/130740164/2723659.pdf
    • http://forelcerrito.com/uploads/1/3/0/5/130539235/gawukinu.pdf
    • http://effinwater.net/uploads/1/3/0/6/130605135/014bf4d8b3.pdf
    • http://kareesa.com/uploads/1/3/0/8/130874066/8164778.pdf
    • http://theotherevilsister.com/uploads/1/3/0/6/130621918/gulilu.pdf
    • http://www.soflomobilechiropractic.com/uploads/1/3/1/1/131164118/43a7c60.pdf
    • http://tetelestaiwhitefish.com/uploads/1/3/0/6/130620669/netutak_rajufokonotuk_gamiwiwe.pdf
    • http://hostmaster.praktijkkeerpunt.com/uploads/1/3/0/6/130639300/807735.pdf
    • http://mpaclarke.com/uploads/1/3/0/7/130739059/f7fea082b441.pdf
    • http://poppinpioneervalley.com/uploads/1/3/0/5/130541077/4532490.pdf
    • http://ritasbeautysupply.com/uploads/1/3/0/7/130739261/c0dc090d5e6.pdf
    • http://lockstocktakeaway.shop/uploads/1/3/0/3/130323630/80b7a3c1a.pdf
    • http://nyabdmv-org.pftsports.com/uploads/1/3/0/6/130604321/2883108.pdf
    • http://coffeetimenews.ca/uploads/1/3/0/5/130550704/6423193.pdf
    • http://mta-sts.mail.hicksandsonsjunkremoval.com/uploads/1/3/0/6/130620745/wixoxaz.pdf
    • http://mta-sts.mail.hicksands
    • 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_off00007fc2.bin
e4dc611fcae53f54a6694af65e42c879a25fbad0189438aa68e62b959a44c891		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC2 8540 bytes

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