Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf617f9aae86c473…

MALICIOUS

PDF

74.2 KB Created: 2021-02-17 20:08:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fefd6ccde107993cdc528b159dec95a8 SHA-1: f27fceb28e49435e24ff0e2163439c50553d4069 SHA-256: cf617f9aae86c473808b6343488119e3406395265c83e26dc45287e6cd753c4b
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=what+are+the+largest+rivers+by+volume In PDF document text
    • http://jigitozunawada.66ghz.com/zinaponopopusifuji.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/uhgwigH/arena_football_teams_for_sale.pdfIn PDF document text
    • https://kazumole.weebly.com/uploads/1/3/1/4/131454435/tefebupofeke-duruzotaju-sukajaje-dorolod.pdfIn PDF document text
    • https://cdn.sqhk.co/susotizakaxe/fghl3DT/16096882642.pdfIn PDF document text
    • http://demask.space/famenujarajupiwatuds6940.pdfIn PDF document text
    • http://astrohelp.space/bobosi36o37.pdfIn PDF document text
    • http://jirafka.space/instructional_materials_service_animal_science_answersnt07f.pdfIn PDF document text
    • http://zirekafeti.iblogger.org/27267336435.pdfIn PDF document text
    • http://kpovli.ru/130045005224r2ye.pdfIn PDF document text
    • https://xaxexuwolak.weebly.com/uploads/1/3/5/9/135978614/zogonodig_futoxigufeve_pibeluvovuzabir_rikenabaj.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/fLsibgg/superstar_life_cheats_for_diamonds.pdfIn PDF document text
    • https://supeneti.weebly.com/uploads/1/3/2/8/132815050/gaxexirazusotipuv.pdfIn PDF document text
    • https://cdn.sqhk.co/gabogivoxavi/jjbPKha/battlefield_companion_app_bf5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mopafanimuwez.epizy.com/munatomo.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/tecnica_paracentesis_abdominal.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/25425142812.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/elimination_reactions_of_alkyl_halides_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/binomial_expansion_test.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_off0000e243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE243 5416 bytes
SHA-256: f7c048f0ccc494779c944f0427058ee1803eedc49a7919ecd8e26e09137bed78
font_01_sfnt_off0000f498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 12260 bytes
SHA-256: 2f9f3cde33a4cf65ef62bcfe249e618d72223a07530f0697c3827c39e891ed30

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