Malicious PDF — malware analysis report

Static analysis result for SHA-256 6339c74da7d04be8…

MALICIOUS

PDF

45.9 KB Created: 2020-03-25 13:22:32 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 83ab4636aacaa83eae42be5b795ad502 SHA-1: 110a83c5fc149b3bc993d697aa3274e7b7d7e183 SHA-256: 6339c74da7d04be8b13e7ff4fd38580f34fed58a076866d6a9c5eeb280a7740f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The document body, though partially obfuscated, includes a URL that appears to be the primary lure. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content.

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://kinkiosk.com/uploads/1/3/0/7/130776263/130776263.html#cuentos+de+ciencia+ficcion+inventados+muy+cortos
    • http://www.viceversacreation.ca/uploads/1/3/0/4/130483489/woduzokowi-samiruvador-vevapa-gilop.pdf
    • http://mta-sts.mx.corridordemoday.com/uploads/1/3/0/8/130814652/pemef.pdf
    • http://robbenoptics.com/uploads/1/3/0/7/130739817/2983414.pdf
    • http://androidbyexample.com/uploads/1/3/0/3/130313657/3485991.pdf
    • http://deblokletter.be/uploads/1/3/0/7/130739063/1270306.pdf
    • http://paradisecoastreview.com/uploads/1/3/0/2/130272977/tofaluxa_keximerus.pdf
    • http://www.megaoutdoorsgames.com/uploads/1/3/0/4/130435743/dc984fa78cb.pdf
    • http://www.photographylink.co.uk/uploads/1/3/0/8/130813448/pexexas.pdf
    • http://mundanecreativity.com/uploads/1/3/0/6/130639373/tezinu-dowivojotiwa-tevosin.pdf
    • http://www.backtopulse.com/uploads/1/3/0/5/130551303/dexanineru-seguvom.pdf
    • http://wigo.blog/uploads/1/3/0/3/130313572/8244119.pdf
    • http://outoftheshell4u.com/uploads/1/3/0/6/130620746/5591451.pdf
    • http://andersonandhartlaw.com/uploads/1/3/0/2/130289386/jofonejibidakabiten.pdf
    • http://mail2.yoya-textiles.com/uploads/1/3/0/3/130313035/jenipagitimugil-rutomivetof-fewurekorid.pdf
    • http://animalclinicofchardon.preview.pethealthnetworkpro.com/uploads/1/3/0/3/130379193/nezafisivixafagepem.pdf
    • http://champaignsportsauthority.com/uploads/1/3/0/8/130814611/dajexijomeja_gitoxeso_mojofedonosu_wogebekidaxawof.pdf
    • http://poquitito.com/uploads/1/3/0/6/130605196/tawowaxudiratelutuvo.pdf
    • http://moscowunited.org/uploads/1/3/0/5/130543369/7fd6c7.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_off000087b6.bin
095e29fe9222a55d10d22a8727b8fba8f5cc66038bc3450091b24def926e4884		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87B6 8788 bytes

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