Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac14968a78cbfcc4…

MALICIOUS

PDF

74.3 KB Created: 2021-02-22 12:51:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 324da66c4dd690afd8e18760b5d25e50 SHA-1: 5bfa073a9624e0cb7000638e5833a39aeaf01d0d SHA-256: ac14968a78cbfcc4318a3d9e1a21f56ba641a089f57acd0a008714e0c86ff409
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=super+dancer+chapter+3+winner+prize'. This URL is likely used to redirect the user to a phishing page or to download a secondary payload. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing and potential malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=super+dancer+chapter+3+winner+prize
    • https://cdn.sqhk.co/joraxeneli/c3hgWVE/home_gym_assembly_services.pdf
    • https://cdn.sqhk.co/fovuxugo/4hcqhbN/khloe_kardashian_net_worth_2009.pdf
    • http://ryursew.space/hmrc_uk_tax_return_deadlineat3tb.pdf
    • https://cdn.sqhk.co/padixemugex/hNgdFgA/best_animated_movie_quiz_and_answers.pdf
    • http://mezoterilijixa.22web.org/application_form_for_blue_badge_scotland.pdf
    • https://cdn.sqhk.co/fokivetezabu/jjK2djg/polaroid_originals_color_film_for_i-_type.pdf
    • http://datab.vip/strikers_1945_ww_best_planetedpl.pdf
    • https://cdn.sqhk.co/likamigid/Hm0idjb/53672583029.pdf
    • https://cdn.sqhk.co/waxigapo/jiaLhf7/22502486407.pdf
    • https://cdn.sqhk.co/taxeseta/xgjihdL/xonenuzixetazubiliratotux.pdf
    • https://cdn.sqhk.co/selugijibix/gc4jige/shot_clock_meaning.pdf
    • https://cdn.sqhk.co/tajiwikiter/DWKjejd/bigos.pdf
    • https://cdn.sqhk.co/wemofisejaf/RK4okyR/rank_and_file_employees_singapore.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jusowegakero.epizy.com/king_size_platform_bed_near_me.pdf
    • http://jetiloguj.rf.gd/medidas_cautelares_cpp.pdf
    • https://s3.amazonaws.com/lorifumofelu/cassation_decision_volume_15.pdf
    • http://ruvilex.rf.gd/tenancy_agreement_word_format_malaysia.pdf
    • https://s3.amazonaws.com/zifilobesumafi/daxegedulakuziruxis.pdf
    • http://zakivijojinikij.epizy.com/square_root_of_256_simplified_radical_form.pdf
    • https://s3.amazonaws.com/sepovutapakogaf/89242294620.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc9b.bin
519632580f615d51b18d7b5646fd468f0b4acfa18420102ffe4b0d1601041c7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9B 5360 bytes
font_01_sfnt_off0000eee5.bin
7420db9ec41012b263dff8e0d039d2a895961a6b4c1647eabbcd20f441fad98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE5 1936 bytes
font_02_sfnt_off0000f82c.bin
15977569b0fa5cbea65065d03c697900e9f630d1033d91a62b238eb12e3aef7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF82C 10376 bytes

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