Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f18beaeb5cbfcf5…

MALICIOUS

PDF

40.3 KB Created: 2020-03-26 03:00:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: daf67b601eb48b84d5d7942fb4d34567 SHA-1: 2666cca3eb73f7c2e66978b8f3f6d4568536f469 SHA-256: 3f18beaeb5cbfcf58acabff3ce66926a132e7065457f42e27a419796a0552bfc
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on different domains. This pattern is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malicious content or improve search engine rankings for harmful sites. The ML classifier strongly supports the malicious nature of this PDF.

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://avabaycompany.com/uploads/1/3/0/7/130739633/130739633.html#jeet+kune+do+dojo+near+me
    • http://theitpros.ca/uploads/1/3/0/4/130475923/tiradokeletaj.pdf
    • http://travellight.online/uploads/1/3/0/4/130476557/motalepef.pdf
    • http://genwhyexperienceglobal.com/uploads/1/3/1/3/131383441/1276401.pdf
    • http://thetacticalfisherman.com/uploads/1/3/0/6/130620469/tejoxozuva_fiduvuvoligo_wupabajesad.pdf
    • http://tamcoh.org/uploads/1/3/0/5/130589195/5899958.pdf
    • http://dandmsalesofflorida.com/uploads/1/3/0/4/130488786/mawuzuvikumipoter.pdf
    • http://www.isu4.com/uploads/1/3/0/7/130776349/ruzivotonu_diwukutavo_sawojusoraku.pdf
    • http://x0169003xstreamtravel.xsideas.com/uploads/1/3/0/7/130775398/225b1.pdf
    • http://scottspeanuts.com/uploads/1/3/0/7/130775372/4343498.pdf
    • http://organicolosangeles.com/uploads/1/3/0/6/130604778/dusudavozasin-tewezu-moxatotixivite.pdf
    • http://dlrapartments.com/uploads/1/3/0/7/130739756/tisizolikizefegazera.pdf
    • http://www.minute-memories.com/uploads/1/3/0/8/130874352/f0efa87f.pdf
    • http://ntechnologyinc.com/uploads/1/3/0/6/130604315/8913291.pdf
    • http://lukesguitartuition.com/uploads/1/3/0/2/130289235/nawunizupusefuxumu.pdf
    • http://dvnus.com/uploads/1/3/0/2/130291800/d0f152a8d8.pdf
    • http://claudiafreepoint.com/uploads/1/3/0/4/130483426/bc7d515d78d.pdf
    • http://jakeswesterngrill.com/uploads/1/3/0/5/130545643/tifel-pixufuzam-vitijexutoj-jawab.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_off0000729f.bin
61d5c3a5a50d61e38e3a71bc729428894d231f41cf8badcc2fd3f24354001f92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729F 8236 bytes

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