Malicious PDF — malware analysis report

Static analysis result for SHA-256 052dc0bd987da845…

MALICIOUS

PDF

44.6 KB Created: 2020-05-20 00:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10245ad13ed7310655e0701050b99b1a SHA-1: 5fa61a1422e1952ff4cdbc7f7bba8ae54ccb4153 SHA-256: 052dc0bd987da8452e825f15fb5c470a9acd73a707a73cd3cc43cdce4985fe23
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or a method to distribute malicious content indirectly. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dinospice.de/uploads/1/3/1/4/131455416/131455416.html#vs+kansas+state
    • http://vita-james.com/uploads/1/3/0/7/130775260/8049554.pdf
    • http://savantpublishing.com/uploads/1/3/0/2/130273814/pojesuniwor-kixofizarotofik-sugawel.pdf
    • http://hueboutique.shop/uploads/1/3/0/7/130740250/5b2b98982f.pdf
    • http://parkerkidsfirst.com/uploads/1/3/1/6/131607169/a2c22ac978766.pdf
    • http://billmorrisonphotos.com/uploads/1/3/0/8/130873810/bojutozum.pdf
    • http://blacklinetransportioninc.org/uploads/1/3/0/7/130775825/nizolujoselal_zideza_didanafezo_nureva.pdf
    • http://bwmin.org/uploads/1/3/1/3/131398278/5399032.pdf
    • http://patriotplayerstheatre.com/uploads/1/3/0/8/130814466/9158457.pdf
    • http://ferri-pesce.com/uploads/1/3/0/3/130323764/siwesuviduwinipevos.pdf
    • http://hidayahjewels.com/uploads/1/3/0/6/130604752/zalikigepoka-rovapuk-rewuboduji.pdf
    • http://eventocidadao.com/uploads/1/3/1/0/131069950/7911915.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081f1.bin
1b00e56633596d35094e49a1ea3416260d025ff035214548a83da6c68d64475b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F1 11084 bytes

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