Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cac6f0a59533c4…

MALICIOUS

PDF

54.4 KB Created: 2020-04-20 03:09:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f4c665a150d39e09f51998f0e4dba215 SHA-1: 659c4bcbba2ffd4acbaab7222b7f0c5ade5aa2af SHA-256: 08cac6f0a59533c40068f2ced84f695a2c8e246fca6bc86ac55565da475bc6dc
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, suggesting a malicious intent to redirect users to potentially harmful sites. The document body, though partially corrupted, includes a URL that aligns with the 'wheel of fortune' theme, likely a lure. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs points towards a drive-by download or phishing attempt.

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://onkoyoga.com/uploads/1/3/1/3/131379324/131379324.html#wheel+of+fortune+reversed+tarot+guide
    • http://pm1nco.com/uploads/1/3/0/7/130775455/160d281.pdf
    • http://realremodeling.biz/uploads/1/3/0/6/130620794/6530940.pdf
    • http://immobilierekyoto.com/uploads/1/3/0/5/130539442/e2414ee.pdf
    • http://iamherproject.com/uploads/1/3/0/7/130776241/1557900.pdf
    • http://abestfriendofgod.com/uploads/1/3/1/3/131384374/wekutolinova-xokidasesoputim.pdf
    • http://gettelreporting.com/uploads/1/3/0/5/130588810/fcfb2de.pdf
    • http://catsmemories.com/uploads/1/3/0/6/130640097/noxegurilosezog_xododepa.pdf
    • http://thebackupcloset.net/uploads/1/3/1/4/131437628/defizezi_sakipitinirane_faxobukawewek.pdf
    • http://shearswarehouse.com/uploads/1/3/0/3/130313466/79dbc.pdf
    • http://rivaorganizer.com/uploads/1/3/1/3/131381619/bifemetibusukat_zivin_petimesutofesaz.pdf
    • http://nicoleunthreaded.com/uploads/1/3/0/5/130541221/dagolofazanudupu.pdf
    • http://dhaneshwara.com/uploads/1/3/1/1/131164114/xizuni.pdf
    • http://maryannbylander.com/uploads/1/3/1/3/131378774/4423961.pdf
    • http://moonpawdesigns.com/uploads/1/3/1/1/131164234/f10068edb0b.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_off0000ad09.bin
466f95080a9ee58eacd461a369e89299a2974bce527d5a5dd501e9ee80d330dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD09 8348 bytes

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