Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69f69544cd041df…

MALICIOUS

PDF

38.0 KB Created: 2020-05-14 06:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 328ffca5623402631de1330b406d4dd0 SHA-1: 562cc2497e94c8789cd9cc216e27192578218c09 SHA-256: f69f69544cd041df8571ddf7117571893ee55a9b0206d8378a197b826f17cccc
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to manipulate search engine results or distribute further malware. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the sheer volume of outbound links points to a delivery or redirection mechanism.

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://nightingaletechnology.us/uploads/1/3/1/4/131453268/131453268.html#anjana+songs++free
    • http://somniummortemmovie.com/uploads/1/3/0/3/130313854/fesajawul.pdf
    • http://ecuapymes.ec/uploads/1/3/0/6/130621345/sujuraj-nizogixipo.pdf
    • http://artisantrades.biz/uploads/1/3/0/7/130739561/josex_xagif.pdf
    • http://transrationalstrategy.com/uploads/1/3/0/5/130588210/9207631.pdf
    • http://happypaintingdecorating.com/uploads/1/3/0/2/130287527/xonud.pdf
    • http://interfacehr.com/uploads/1/3/1/3/131379945/a6f43243297.pdf
    • http://domitillezakia.com/uploads/1/3/1/3/131383998/gosedabela.pdf
    • http://mahmudhamdiassociates.com/uploads/1/3/0/2/130289196/dutikagamoka_donasawajobop.pdf
    • http://offyachest.com/uploads/1/3/0/6/130639133/joxasubapugolijig.pdf
    • http://nysafp.fit/uploads/1/3/0/4/130491001/pokumabutatuvabiwoni.pdf
    • http://closinggoals.com/uploads/1/3/1/4/131407353/b63fee6297.pdf
    • http://wzb-ludwig.com/uploads/1/3/0/2/130272976/fixegomak-tafosukenitiga.pdf
    • http://mediaviralterkini.net/uploads/1/3/0/5/130539458/dajuregusidux.pdf
    • http://kowbiemedia.com/uploads/1/3/1/0/131070146/4736532.pdf
    • http://pattikeane.com/uploads/1/3/0/5/130551041/berokuwusa_kobalewipeniv.pdf
    • http://gogetitconference.com/uploads/1/3/0/2/130270738/wibunovok.pdf
    • http://tsigearandsupply.com/uploads/1/3/1/8/131856276/913741.pdf
    • http://maireadpeachey.com/uploads/1/3/0/3/130313314/wurobugala.pdf
    • http://cheeseandchutneyoakcliff.com/uploads/1/3/1/3/131383604/xajigokoxurimupa.pdf
    • http://jmpremiumgcinc.com/uploads/1/3/1/4/131437069/lugametadagikuj.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_off00006145.bin
299b7c696ffab2a981f06011ae0794410f501089facf6ae556919f6ca33884a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6145 13812 bytes

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