Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a0f8725d034ff63…

MALICIOUS

PDF

32.6 KB Created: 2020-04-18 15:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 07d702da2e4f6dd41fff06cd73707c97 SHA-1: d0a9abc802d41611cef33daa75890aed3b422cb1 SHA-256: 3a0f8725d034ff632227c312019dd8d158b21ba462e50fcedd7db4f23924e310
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged by a machine learning classifier with high confidence. It contains a significant number of external links, many of which point to similarly structured URLs on different domains, suggesting a link farm or SEO abuse tactic. The primary purpose appears to be to lure users to these external sites, which likely host further malicious content or phishing pages. No scripts were extracted from this sample.

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://georginagarciaobledo.com/uploads/1/3/0/7/130739049/130739049.html#skillet+comatose%28+lyrics
    • http://declareyourday.com/uploads/1/3/0/4/130435726/717eb2c3b2.pdf
    • http://sportsclubphrases.com/uploads/1/3/0/7/130739164/7486245.pdf
    • http://hostmaster.rent-a-ramp-cheltenham.co.uk/uploads/1/3/0/5/130588861/6529648.pdf
    • http://ucalbums.org/uploads/1/3/0/4/130483653/d4b7025a43932.pdf
    • http://penrithclothingalterations.com/uploads/1/3/0/2/130271051/rivir.pdf
    • http://thrivecampaign.com/uploads/1/3/0/9/130969884/kokugesiva_kanumifopajed.pdf
    • http://pawsofrelaxationportraits.com/uploads/1/3/1/4/131406895/koduve.pdf
    • http://orbisdistributionltd.com/uploads/1/3/0/4/130475984/jixaw.pdf
    • http://raysgrooving.ie/uploads/1/3/1/6/131606233/zofam.pdf
    • http://uprightsolutionsbpo.com/uploads/1/3/1/4/131438397/c8468e4218b2e.pdf
    • http://totalelectronicsonline.net/uploads/1/3/0/3/130323453/917068e.pdf
    • http://valuefavor.com/uploads/1/3/1/4/131483020/zugim.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_off000057c0.bin
af0d6378407b3244f47c3742599a4c07ea05cb5f5aa0676eacdc5514f0144f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C0 7956 bytes

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