Malicious PDF — malware analysis report

Static analysis result for SHA-256 3125ee2dbfa3b046…

MALICIOUS

PDF

32.0 KB Created: 2020-04-01 16:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ccddac3ed36d29fbd9c0720edfa23824 SHA-1: 2cb444c67771fa72c000f86a221be31dcf34ba07 SHA-256: 3125ee2dbfa3b046671185d5a1f2156fb4657b993bfd74f12225e9ca82e051a5
94 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier with high confidence. It functions as a link farm, containing numerous external URLs pointing to other PDF files hosted on various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a tactic to manipulate search engine results or distribute further malicious content. The presence of many unknown-reputation URLs reinforces the suspicious nature of this document.

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://nimbledevices.com/uploads/1/3/0/7/130776157/130776157.html#marcus+theater+bay+park+square
    • http://swimhammond.org/uploads/1/3/0/5/130589339/xuvoxexiteki.pdf
    • http://nickgaristopracticum.com/uploads/1/3/0/4/130435844/8131868.pdf
    • http://omeraziz.com/uploads/1/3/0/5/130544494/addcd7a33.pdf
    • http://bodyessencellc.com/uploads/1/3/0/2/130270924/banegetul_sikuveza.pdf
    • http://vintageveneers.com/uploads/1/3/0/6/130640219/karuwizeroxabudo.pdf
    • http://mhsbooster.bluewireweb.com/uploads/1/3/0/5/130588269/gupigapox.pdf
    • http://indiasboutique.shop/uploads/1/3/0/7/130739615/nixapoginibupur-rumemuno-mugubem-kofusolekakeb.pdf
    • http://crazybeautifulessentials.com/uploads/1/3/0/2/130288333/ddf0f6f0c5315.pdf
    • http://touteslespromesses.com/uploads/1/3/0/9/130969399/mujameg.pdf
    • http://downumllc.net/uploads/1/3/1/4/131406449/sonipepudipodori.pdf
    • http://ronisutardi.site/uploads/1/3/0/6/130639712/kesizuwixixetoxutopo.pdf
    • http://braintreeceramics.com/uploads/1/3/1/1/131163832/2233572.pdf
    • http://vinloan.com/uploads/1/3/0/5/130551486/tazawugunijage.pdf
    • http://rockislandindustrialtools.com/uploads/1/3/0/5/130540366/kerimosekawe.pdf
    • http://jdoze.com/uploads/1/3/0/6/130604944/morobisurafa.pdf
    • http://eclairtech.com/uploads/1/3/0/5/130590380/cce34.pdf
    • http://alniyatbellydance.com/uploads/1/3/1/4/131453807/cbf7d9.pdf
    • http://kredihold.com/uploads/1/3/0/2/130270912/8370697.pdf
    • http://btvproperty.com/uploads/1/3/0/4/130436152/3a4b6fab9.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_off000057b4.bin
eaa0c36a4c6fb61eccf9d5ffb2cd457074944b5eced27fc25fa43d12a943cc9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B4 6788 bytes

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