Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dda427735580b09…

MALICIOUS

PDF

72.5 KB Created: 2021-02-18 05:03:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 579e3af194111c8783e24affa5c6b50c SHA-1: 19b47df09c97e328e61bea53fec959c4c8720cf2 SHA-256: 8dda427735580b09ac0c48ed217f16d0d002ef365dba88d6c07fc7d2924fa28f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=things+that+start+with+a+d In PDF document text
    • https://cdn.sqhk.co/merabuvi/hZCnibN/temipefo.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/jjyhjif/71052232338.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/haUdhZZ/project_pinball_drawing.pdfIn PDF document text
    • https://cdn.sqhk.co/wugotiparo/Mr66Mgh/mepemibazujitopomive.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/j940Vhe/cafe_racer_bike_for_sale_los_angeles.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/O0gcggz/96436554408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468531/normal_602c1187930d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_5fe252a939d01.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/bClucge/10541477548.pdfIn PDF document text
    • http://balonedud.iblogger.org/android_bluetooth_tutorial_github.pdfIn PDF document text
    • https://cdn.sqhk.co/lubigegek/bhjheWL/winking_lizard_menu_avon_oh.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/geUicuV/guputudefirujo.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/hhg07ij/8405264162.pdfIn PDF document text
    • http://sokuzise.iblogger.org/formal_definition_of_amputee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481168/normal_5fda3d1419574.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/dazinibonofobi/93661967028.pdfIn PDF document text
    • http://zufonokimilije.epizy.com/waxadedabavanejabe.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/femet.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/16250847.pdfIn PDF document text
    • http://xuwugufufokiti.epizy.com/abrahaminte_santhathikal_malayalam_movie_video_songs.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_off0000e00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00D 5096 bytes
SHA-256: 76977ab4e684d6f0d550d453268e484ecae832f4386d7b293b2d81e1a15e594a
font_01_sfnt_off0000f16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16F 10224 bytes
SHA-256: c174b4d43e9ef350d7a28224e2454b48b26b1ca6b8c242eaa8df48afcc84eb53

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