Malicious PDF — malware analysis report

Static analysis result for SHA-256 008e847e42aefa35…

MALICIOUS

PDF

41.0 KB Created: 2020-04-28 04:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0bcccbff2ab0c726b83edba2a150f341 SHA-1: 4f55a1b824ff2c31635e080ee24ab5e21509ca54 SHA-256: 008e847e42aefa35797cfa641b409ee73197963c000711d3fd7e243382d19202
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to PDFs with numeric slugs, indicative of a link farm or SEO poisoning technique. The document body also contains a URL, 'http://andyrev.com/uploads/1/3/0/6/130603965/130603965.html#escape+50+room+game++for+pc', which is presented as a game. This suggests the primary goal is to drive traffic to malicious or deceptive websites.

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://andyrev.com/uploads/1/3/0/6/130603965/130603965.html#escape+50+room+game++for+pc
    • http://centralnorthcommunity.org/uploads/1/3/0/4/130436410/kigoturixerob-dezogax-nuvofit.pdf
    • http://hillsmobilemassage.com/uploads/1/3/1/8/131856539/5581611.pdf
    • http://karomimi.com/uploads/1/3/0/2/130272483/refatik.pdf
    • http://bloom95.com/uploads/1/3/0/9/130970015/1271921.pdf
    • http://authorjulietcarrera.com/uploads/1/3/0/5/130539227/65112fec882.pdf
    • http://redthreadtour.org/uploads/1/3/1/1/131164249/1761381.pdf
    • http://theowlandtheravens.com/uploads/1/3/0/7/130739878/aefc5428a5a9.pdf
    • http://serenityvineyards1977.com/uploads/1/3/0/6/130639406/6623946.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ed0.bin
09047bf9e80339c05be2f1ae5e34f213ad2828d484977084ad8f64d4f66195bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED0 8520 bytes
font_01_sfnt_off00008f82.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F82 1708 bytes

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