Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db25fcbbe440dfc…

MALICIOUS

PDF

41.2 KB Created: 2020-03-12 05:43:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e7a70736fea7d3fd5477411e8bb6dec9 SHA-1: 597588002c48d2f82fc3e4bdb15d2a68634257ca SHA-256: 4db25fcbbe440dfc6ee18ee89d0935bf05f3856f9d53468cfc0c09bc5f549eea
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are numerically or generically named PDFs hosted on various domains. This pattern is indicative of a link farm or SEO abuse technique, likely intended to direct users to malicious content or phishing pages, as suggested by the 'Asurion phone claim cost' lure in the document body. 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://74-123-78-37.mgwnet.com/uploads/1/3/0/8/130874378/130874378.html#asurion+phone+claim+cost
    • http://petpositivo.net/uploads/1/3/0/5/130588678/limajilisesa.pdf
    • http://monikagodsmark.com/uploads/1/3/0/3/130313641/pabig_wiweketovu_lujopodaxivadep_xafoni.pdf
    • http://nova-torg.net/uploads/1/3/0/7/130739916/dd6f8.pdf
    • http://astrologieparis.fr/uploads/1/3/0/4/130476887/jobazi.pdf
    • http://ww.napatwork.nl/uploads/1/3/0/4/130476866/wesefiz-tagoraj.pdf
    • http://www.behavinglively.org/uploads/1/3/0/3/130313698/983632da9c8433.pdf
    • http://rockchurchriverside.com/uploads/1/3/0/2/130289247/podidozon_dipogipewife_labalukiruzu_wiwesemodifoso.pdf
    • http://www.capacitylive.co/uploads/1/3/0/5/130588320/6131aa034bfbe59.pdf
    • http://thechurchlawgroup.com/uploads/1/3/0/6/130620801/3773457.pdf
    • http://treatmentcollaborative.com/uploads/1/3/0/2/130272586/1320607.pdf
    • http://abileneallies.com/uploads/1/3/0/8/130813557/8dc4d041b.pdf
    • http://andre-aussiedoodles.com/uploads/1/3/0/9/130969428/f9970f8.pdf
    • http://customerschoicellc.com/uploads/1/3/0/2/130272592/xirixusepubep-lusuk-luwoji-vilop.pdf
    • http://handnhandfinancial.com/uploads/1/3/0/8/130814423/jizepelamak.pdf
    • http://www.kathybacongreenberg.com/uploads/1/3/0/4/130489019/6657670.pdf
    • http://lizardrockstoneandtile.com/uploads/1/3/0/5/130589229/neredeguwe-didekoxuritu-xozojopupikoza.pdf
    • http://35ewc.com/uploads/1/3/0/6/130604129/rodow-jemumujumabij.pdf
    • http://livetrillapparel.com/uploads/1/3/0/6/130639561/rilor.pdf
    • http://roomshakerrecords.net/uploads/1/3/0/5/130540352/ruxejepadej.pdf
    • http://nutricionbasadaentrofologia.com/uploads/1/3/0/5/130550743/nopipugizaj.pdf
    • http://surtimportaciones.com/uploads/1/3/0/6/130640095/973110.pdf
    • http://www.appnetlosungen.com/uploads/1/3/0/2/130273812/a3cd4.pdf
    • http://rubymacfashion.com/uploads/1/3/0/6/130603855/nugutuxi-divikaned.pdf
    • http://mail.baanyingfamily.com/uploads/1/3/0/6/130621826/884163.pdf
    • http://mail.restaurantslabbinck.be/uploads/1/3/0/6/130621958/06d6a63.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_off00007618.bin
32380a3a738ea29a08636fd859d8632462f1f15cd8652ab3dd4109da4e56ef33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7618 8132 bytes

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