Malicious PDF — malware analysis report

Static analysis result for SHA-256 1548f71d84e30b47…

MALICIOUS

PDF

36.1 KB Created: 2020-04-16 09:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 23dfab89ee54f30a1cd98557535b694e SHA-1: c6e21b95bc6e126252e4485a6524e0084729344d SHA-256: 1548f71d84e30b4743c702c0acdd7e7e3790f7594f3900b5635916bc043898b0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, masquerading as a meditation script, which is characteristic of a link farm or SEO spam campaign. The ML classifier strongly indicated maliciousness, and the presence of numerous external URLs suggests an attempt to direct users to potentially harmful content or further stages of an attack. No scripts were extracted, limiting the analysis of direct malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://reboundat.com/uploads/1/3/1/4/131437668/131437668.html#mindful+eating+guided+meditation+script
    • http://newvisionedsolutions.com/uploads/1/3/1/6/131637432/4958574.pdf
    • http://acsphillycloud.com/uploads/1/3/0/9/130969130/rurivexalajorosol.pdf
    • http://lollypopstars.com/uploads/1/3/1/6/131637113/petusasuge.pdf
    • http://recordingarts.guru/uploads/1/3/0/3/130379517/fizovanozerim-jadunid.pdf
    • http://thesoaperyshoppellc.com/uploads/1/3/1/6/131606597/jemivizaseko.pdf
    • http://countryroadspickleballclassic.com/uploads/1/3/1/4/131437636/9fbb2e561e93ba.pdf
    • http://tilesformiles.com/uploads/1/3/0/7/130739906/ronagudobixidowojeru.pdf
    • http://iammassage.org/uploads/1/3/0/4/130476505/fc895f.pdf
    • http://weirdmystery.com/uploads/1/3/1/3/131379596/4038769.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_off0000672c.bin
55cae361a6e57eccc19ccdfcb81bbc715a8e412b53f89aec8df55b09c5eadc1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672C 7468 bytes

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