Malicious PDF — malware analysis report

Static analysis result for SHA-256 33196b85418b3fa4…

MALICIOUS

PDF

35.2 KB Created: 2020-03-29 21:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2b787e1903491b9bca68985641ba0b58 SHA-1: 269d9479e5372a889466baba1d56ad61fd29aa9c SHA-256: 33196b85418b3fa46b43ee108d010cb4f5a23bf2836909e73de1d3e3d3b007ce
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links to external websites, a technique often used for SEO poisoning or to redirect users to malicious content. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs that are also present in the heuristics and URL extraction, suggesting a coordinated effort to drive traffic to these sites.

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://cabinetrefacingdesmoinesiowa.com/uploads/1/3/0/5/130551019/130551019.html#fort+indiantown+gap+cemetery+address
    • http://askachampion.com/uploads/1/3/0/9/130969315/5600304.pdf
    • http://jeejyejoe.com/uploads/1/3/1/1/131164313/xexofavodizasa.pdf
    • http://herbalpharming.com/uploads/1/3/0/8/130874543/4e8192.pdf
    • http://sasvikafashion.com/uploads/1/3/1/3/131383744/5680990.pdf
    • http://loopeezlytz.com/uploads/1/3/0/4/130476039/b00bff60620.pdf
    • http://ozunamarketingagency.com/uploads/1/3/0/6/130605307/94a31ce744.pdf
    • http://michelledgregory.com/uploads/1/3/0/3/130323762/3481711.pdf
    • http://irrigationmedics.com/uploads/1/3/0/5/130542983/detuvi_miwoj.pdf
    • http://nyspanadistrict8.com/uploads/1/3/0/6/130620859/7a3ef89e.pdf
    • http://storypalette.com/uploads/1/3/0/6/130621362/sexobu-miwovonavami-kuguvilata.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_off0000609f.bin
a575a9039d7e767af0b38cfee09ac12058c57464965cc170b6272c5851e802ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609F 8468 bytes

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