Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9989103779997ef…

MALICIOUS

PDF

65.6 KB Created: 2021-02-22 00:59:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: fdc4d1a4feb355c9709932781296858f SHA-1: 12691b5c5b737113db8d92750f648395738dfc7f SHA-256: b9989103779997ef97f3222eaf9a0232004c42a84aea3d3f2e5de6edb79d1f9e
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://bologen.ru/wix?keyword=ethos+pathos+logos+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481417/normal_600e4ca9a57be.pdfIn PDF document text
    • https://cdn.sqhk.co/tifapoxur/8ghzBXq/clock_change_time_radio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482636/normal_5fca7034a6550.pdfIn PDF document text
    • http://wekeb.space/drift_trike_for_sale_australianai38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379974/normal_5ff340dd7a3a6.pdfIn PDF document text
    • https://cdn.sqhk.co/woxekivepi/Hjeihjf/best_programmer_for_2016_6._7_cummins.pdfIn PDF document text
    • https://xugibadibexupov.weebly.com/uploads/1/3/4/6/134684970/kogexadow.pdfIn PDF document text
    • https://rijagadufe.weebly.com/uploads/1/3/1/6/131606992/fodubabob.pdfIn PDF document text
    • http://foyou.store/entry_of_the_gladiators_sheet_music_clarinetw25ox.pdfIn PDF document text
    • http://nigma24invest.online/propresenter_7_costs0zx45.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/magapeguwabe/pesaxudinojuxototewajem.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/latest_bollywood_song_whatsapp_status.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/baadshaho_movie_ringtone_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/granny_mod_apk_outwitt_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/atm_card_form_sbi.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/29559585427.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_off0000c652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC652 5192 bytes
SHA-256: 7c41d7438bfe0391060b46559320a6f7a41fb7aa6adc09bc7374e53830bcbc60
font_01_sfnt_off0000d80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80B 9760 bytes
SHA-256: 16a2a4b9b3ee2619927e55462985cae0a2d85cf312260acb95aee1d8fd25c8d1

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