Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb09430c34f6df3…

MALICIOUS

PDF

50.0 KB Created: 2020-04-11 09:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2acb95f513bcfd7580defb5bc1f6a96b SHA-1: e145109aaca6d1772d5acb7decaa36fe8262fe1d SHA-256: 0bb09430c34f6df3d72c3e39ccd21903a40ec1e160511671af0389e341247198
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, identified as a link farm, likely intended to drive traffic to malicious or SEO-manipulated sites. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports a malicious intent to redirect users. No scripts were extracted, but the overall structure suggests a phishing or traffic-generation scheme.

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://theleawoodfamilydentist.com/uploads/1/3/1/3/131381619/131381619.html#photosynthesis+in+cyanobacteria+pdf
    • http://jaredpawloski.com/uploads/1/3/0/8/130874671/jiburunu-zojareg-ranifi-nutinijexumopu.pdf
    • http://fsglobaltour.com/uploads/1/3/0/4/130488574/9420880af44f4c.pdf
    • http://woflglobal.info/uploads/1/3/0/8/130874639/jepilefafawuxulo.pdf
    • http://deloresdigital.com/uploads/1/3/0/5/130551659/464c4e64ccb0.pdf
    • http://firehouse-dj.com/uploads/1/3/1/3/131380687/dcd8bb8bd1f.pdf
    • http://atwoodarmory.com/uploads/1/3/0/2/130271207/filivi.pdf
    • http://balancedlivingcounseling.net/uploads/1/3/0/3/130313671/2b8a157ed.pdf
    • http://nblandscapingtx.com/uploads/1/3/0/3/130379612/moketolemin.pdf
    • http://sallieservsafe.com/uploads/1/3/0/7/130738796/puwesad.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_off000097e5.bin
32261d6f53f2f27eff7dff1fa4f740d761f3a6c26729657c8b8570e16ba14750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97E5 9560 bytes

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