Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3283e809b45c8e2…

MALICIOUS

PDF

47.6 KB Created: 2020-03-29 05:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f401bea6215bbcd222888bd00c34c7b0 SHA-1: fb46d5e6ee6edfc1c6286db17fb04b2f68846b6c SHA-256: f3283e809b45c8e209e670ff7a24dd39b30485974b1f353152bc6f858f1476de
94 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm designed to manipulate search engine rankings or redirect users to malicious content. The document body, though partially corrupted, contains text related to 'Iso 9001 for dummies' and references wkhtmltopdf, indicating a potential lure. The ML classifier strongly flagged this PDF as malicious.

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://74-123-78-154.mgwnet.com/uploads/1/3/0/7/130776133/130776133.html#iso+9001+for+dummies
    • http://mta-sts.mail.runnerstoke.com/uploads/1/3/0/9/130969726/8581780.pdf
    • http://benoitclerc.com/uploads/1/3/0/2/130274088/zajefeli.pdf
    • http://productdevelopments.net/uploads/1/3/0/6/130621351/5de3d76a50.pdf
    • http://sacredsole.com/uploads/1/3/0/8/130813373/xeniva.pdf
    • http://webdisk.elkethoms.com/uploads/1/3/0/7/130738615/tudewefitazuv_lajepa_lejimosul.pdf
    • http://krissyoneill.com/uploads/1/3/0/5/130551059/8c8a3c8d6af46.pdf
    • http://www.jamonittournaments.org/uploads/1/3/0/7/130739744/gusunad.pdf
    • http://comstar-global.com/uploads/1/3/0/6/130639905/jilirubuvod.pdf
    • http://nodmvpoints.com/uploads/1/3/0/5/130588827/959766.pdf
    • http://vargometals.com/uploads/1/3/0/9/130969709/dee3ed3.pdf
    • http://arandonovan.com/uploads/1/3/0/4/130488861/11da22.pdf
    • http://mta-sts.madebymitchell.com/uploads/1/3/0/6/130640071/7543330.pdf
    • http://gregorymorrisaltoonapa.com/uploads/1/3/0/7/130776449/mekakikekopezovezo.pdf
    • http://cbfgroupllc.com/uploads/1/3/0/6/130605174/6722324.pdf
    • http://hammermancommunications.com/uploads/1/3/0/6/130604653/d40e4f99d1.pdf
    • http://truefaithathletics.org/uploads/1/3/0/4/130476943/sakizuwe.pdf
    • http://host67-131-77-220.static.ahcnm.org/uploads/1/3/0/2/130289237/wufubinal.pdf
    • http://luminosityrl.com/uploads/1/3/0/2/130289652/femixibagesemamijoro.pdf
    • http://savetheplanet.solutions/uploads/1/3/0/2/130287261/senofomon.pdf
    • http://thewestgroup.info/uploads/1/3/0/7/130739326/tedipel.pdf
    • http://oceansidehoodcleaning.com/uploads/1/3/0/6/130621036/6913344.pdf
    • http://maritimeinsurancebroker.net/uploads/1/3/0/5/130590296/3803752.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_off00009371.bin
b5a60aba32885bbd025bc5a4b05c8426a598ee9cfeb70d1c89c5e57bc643b959		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9371 7644 bytes

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