Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9752c203dfebba…

MALICIOUS

PDF

71.6 KB Created: 2021-03-06 07:14:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4d663b52b88c12c2bbfa569921696ffa SHA-1: 6bc72b028151ee37cffe5230f9b0cd07ad03e002 SHA-256: cf9752c203dfebba2b80e14eeab5dcaf2f6084c9bec6621b0da654bf50e90b79
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/wix?keyword=mekong+cafe+full+menu PDF link annotation
    • https://cdn.sqhk.co/telivagawu/fagcOgd/best_worst_80s_music_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/7diijez/funny_girl_screaming_ringtone.pdfIn PDF document text
    • http://lolkek.xyz/bsmrstu_admission_circular_2019-_20lqjpg.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubokave/gfjfqge/solar_system_formation_the_planets.pdfIn PDF document text
    • http://card2card.live/gifigaxf5wc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450430/normal_5fdca4316138b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419828/normal_5fd7a90c6fdd5.pdfIn PDF document text
    • http://vsedlyatebya.xyz/damogotawazetixugejuxuktsz4v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_602b06b37a0c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476952/normal_5ff4d4443fd41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_1a0525820392478aa201cc2676d70360.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sevoga/redundancy_calculator_spreadsheet_victoria.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/chinese_good_luck_symbols_feng_shui.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/sezeviboximeponanevazer.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/vasabapeluvofafurerej.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/milestones_timeline_powerpoint_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/world_history_final_exam_answers_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/kefelipolemudufuzet.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_d1dfbe0146cb42c9bac34900282d0624.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/new_bhojpuri_movie_sangharsh_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/18577909090.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_off0000dad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD8 4996 bytes
SHA-256: 8ff914db014d0ee59b86d351849f9ac556a491c4a0fb3a3a945307a0f1eba7eb
font_01_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 10824 bytes
SHA-256: ce7bf98cb70f868f4abeebf7327bb0bcf01917ba7270bfcbd284ebf94ddd68b0

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