Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c099f7b60d9bd0…

MALICIOUS

PDF

75.0 KB Created: 2021-02-28 08:56:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a960e4e50d6e3fc1e4a7a38a405797bc SHA-1: ea5beda1cac43e305573ebd520d544b4b5555b34 SHA-256: 31c099f7b60d9bd07024c53e0aa726b716b520e14e32d1a0209c895da786b083
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/award?keyword=what+is+chemosynthesis PDF link annotation
    • https://cdn.sqhk.co/fofodafexadu/tici2jg/43585520891.pdfIn PDF document text
    • http://premial.su/36900321253qkaim.pdfIn PDF document text
    • https://cdn.sqhk.co/kivutuzo/iWVjdBV/fatufipaxakusodeniwunowi.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/raCgg9B/a_curved_line_connecting_two_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/kapapomabu/cheiajc/75290577257.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/Fib9jdN/73085825071.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/gKYB4hh/roman_empire_conquered_land_map.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/gqE4jeE/keyboard_sms_free_download_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/mekoposa/BjjqdFG/tegobiwomiriropixasoj.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/uibhjhh/colorchecker_passport_tutorial_photoshop.pdfIn PDF document text
    • http://bijibibisugas.iblogger.org/tom_clancys_rainbow_six_siege_deluxe_edition_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/cOghdia/t_mobile_scam_shield_premium_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/setewefasari/hcYPhbu/dusobovo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jagogapibibolin.epizy.com/total_quality_management_plan_example.pdfIn PDF document text
    • http://rojanesifilagu.myartsonline.com/veselis.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_off0000eba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA0 5028 bytes
SHA-256: c1d1065799d2f0e59f840ddda2b58235153bc1d9a6d37e6005f9917ff6e8ed16
font_01_sfnt_off0000fca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA8 10176 bytes
SHA-256: f4584a10f22a8db1ffc25c02b85acc8630a37e9f2f78533a03f54e2e0ddef3b1