Malicious PDF — malware analysis report

Static analysis result for SHA-256 573fd9276e5b085c…

MALICIOUS

PDF

73.1 KB Created: 2021-02-15 05:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2fb07b666cdc05e9378d163d7e1df9f0 SHA-1: 0b205287fcce4e52d9cb87f7e51fa0937f0d1555 SHA-256: 573fd9276e5b085c756dfe2d45c0dafd3835ffac0ad53d679f11309b0a02b64b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 https://maypoin.ru/wix?keyword=showbox+ad+free+apk+download PDF link annotation
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/7682318.pdfIn PDF document text
    • https://cdn.sqhk.co/kifavubivelo/gjNrFDF/jail_break_prison_escape_game.pdfIn PDF document text
    • https://lirigudufov.weebly.com/uploads/1/3/0/7/130776684/zazemalusutukap-zisajezo-pufemofemo.pdfIn PDF document text
    • https://cdn.sqhk.co/mirusopujame/bghibOp/mepowokitifamiwidudaxap.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/Cjhgfie/5914622475.pdfIn PDF document text
    • https://badobokitevobux.weebly.com/uploads/1/3/0/9/130969603/3198958.pdfIn PDF document text
    • https://povufajesozibu.weebly.com/uploads/1/3/0/7/130739002/kuman-baviku-rapenabutupapo-vejiba.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/eIyWjah/triple_diamond_slots_payout.pdfIn PDF document text
    • https://nuxajitavira.weebly.com/uploads/1/3/1/8/131871558/9843065.pdfIn PDF document text
    • https://cdn.sqhk.co/mawodoso/aTgc7ig/47224835405.pdfIn PDF document text
    • https://cdn.sqhk.co/mitebosareki/t1gjXgi/xagofugisatuxavixob.pdfIn PDF document text
    • https://cdn.sqhk.co/labojime/c8ie8BQ/wewuneputomuripibe.pdfIn PDF document text
    • https://cdn.sqhk.co/xokekekav/nnnnigU/lefuwumok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/meeting_minutes_template_uk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/baseball_9_mod_apk_v1._3._8.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFB 5416 bytes
SHA-256: 3f6445c8900fc138fa6193478320f23bd760f65de1d83c713c3bc65048298eee
font_01_sfnt_off0000de74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE74 10504 bytes
SHA-256: 96f0c2ccf6e96558a43a4c7ee3a0db6bc334a575bf15868cd08f0164c22bbd7e
font_02_sfnt_off00010284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10284 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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