Malicious PDF — malware analysis report

Static analysis result for SHA-256 131c5afd43f79c34…

MALICIOUS

PDF

71.2 KB Created: 2021-02-28 01:28:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 244662636cb6021c83e3250e13044f2e SHA-1: 2324c61afb059097980cdd18ced0d061924409ab SHA-256: 131c5afd43f79c347ccd604773f8512d4bafa2e2f2f138f14f45686c38d1c149
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://dugedepap.ru/award?keyword=how+to+fix+ge+washer+timer PDF link annotation
    • https://cdn.sqhk.co/busibelifiv/igMrIib/logo_quiz_level_252.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/iggjwkS/datiw.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/hbhejdT/5305349316.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/ifBjfec/exercises_to_bowl_faster_in_cricket.pdfIn PDF document text
    • https://cdn.sqhk.co/selodiro/hiiVWgg/drop_it_down_low_lyrics_beyonce.pdfIn PDF document text
    • https://cdn.sqhk.co/bepotedaxus/geghibZ/best_face_masks_for_mens_skin.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/miiAhhb/maze_runner_4_trailer_ita.pdfIn PDF document text
    • https://cdn.sqhk.co/xotakuzazuf/gdjhgf0/total_battle_tactical_strategy_mod_apk.pdfIn PDF document text
    • https://jezuvafu.weebly.com/uploads/1/3/5/3/135348480/2884045.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/nufidibodudulad/hair_brush_for_photoshop_7._0.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/1694668735.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/newilovezakuxek.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/zibudawi.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/befulurepetexilomej.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/appscan_tutorial.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_off0000dbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC5 5268 bytes
SHA-256: 2cc8405fcbc91107e2f627e7853a13f16e2d2781ced47f1d3f8794590a675a2f
font_01_sfnt_off0000eda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA3 10096 bytes
SHA-256: 92c86559db396f7d716693ed550ac20f7e60e22d905fe9c59f650762ca0066bf