Malicious PDF — malware analysis report

Static analysis result for SHA-256 73db0bcd362d9b00…

MALICIOUS

PDF

67.6 KB Created: 2021-02-22 01:37:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2a71fd3cc12e6b1e6e8d2d257d71be25 SHA-1: 7e6433cfdfab97ee686560a242be07ecbee9a3c3 SHA-256: 73db0bcd362d9b00d68a6c2e96ec80316312c93ab239239225a206ebcabdb025
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=anatomy+final+exam+answers PDF link annotation
    • http://tularafujebok.iblogger.org/didesizubufitukabiru.pdfIn PDF document text
    • http://vovevowumusiki.iblogger.org/kejevixujakigaxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501660/normal_6008de6fcdeac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465255/normal_5fea24a128331.pdfIn PDF document text
    • https://mawubuzepegi.weebly.com/uploads/1/3/3/9/133989242/5439dff18ce1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408598/normal_600bd4fb532be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391909/normal_601d9afa601cb.pdfIn PDF document text
    • https://jifilebipik.weebly.com/uploads/1/3/4/3/134375607/togidifojafawenebowi.pdfIn PDF document text
    • https://nopefulewipedu.weebly.com/uploads/1/3/4/3/134314682/sereronubo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tujatubaniza.epizy.com/12426908232.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/36390690521.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/navodaya_application_form_karnataka.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/37096364820.pdfIn PDF document text
    • http://waxaravibew.epizy.com/993667068.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/nezedogevefupixisiruw.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/joxosirevitogu.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/whirlpool_generation_2000_fridge_freezer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/tiwosujuxapemevexonet.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/digegitijaxunabajinu.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/duplicate_finder_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/sosipa.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD25 5164 bytes
SHA-256: 44031da6429e21937f1094afed65038cf51b39e194eac840370cb20fc1f8da65
font_01_sfnt_off0000dec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC0 10060 bytes
SHA-256: a2df2ee9a30c475504406c6b3cfd0d4b0fdaab470d04dd615360bb26642bc614

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