Malicious PDF — malware analysis report

Static analysis result for SHA-256 16dd70536d4d52b7…

MALICIOUS

PDF

82.0 KB Created: 2021-02-15 21:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ee9676b9cdd6982a9d6087eaafb65d92 SHA-1: 9e702e3f7821c092f022c56ec28a5d1295d9056a SHA-256: 16dd70536d4d52b774abdbea9f7b7f7543c709462431c7b6af97258845f1df62
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://yafferge.ru/wix?keyword=how+to+open+gba+cartridge+case'. This URL is presented as a lure to trick users into clicking it. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector indicates an attempt to lead the user to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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=how+to+open+gba+cartridge+case In PDF document text
    • https://cdn.sqhk.co/zaborofisi/hjncjaM/50386323176.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/jCxifii/zarchiver_pro_apk_download_for_pc.pdfIn PDF document text
    • http://roskycnmx.com/85191169874lhber.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/ggJhjgj/zonuvejinumeg.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/g0Rddhh/wonatofivunukot.pdfIn PDF document text
    • https://cdn.sqhk.co/bujiwamovul/Czhhjmb/79128403557.pdfIn PDF document text
    • https://cdn.sqhk.co/weteroliwo/ihegjX9/ear_infection_in_dogs.pdfIn PDF document text
    • http://koolmaxt.online/vojedupuvuzuwujadukedo2kuyl.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/ifBggjg/turbo_dismount_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/somufegojaru/ibgiihU/dc_comics_black_female_superheroes.pdfIn PDF document text
    • http://ru-dev.xyz/a_child_s_christmas_in_walesg335h.pdfIn PDF document text
    • https://cdn.sqhk.co/degavorofala/PjiDie4/49814167012.pdfIn PDF document text
    • https://cdn.sqhk.co/mobubivifa/iaQBsih/bibafuluzutisewemixumado.pdfIn PDF document text
    • https://cdn.sqhk.co/vemegunir/i2jh7gd/davos_switzerland_travel_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/sadoburola/02hf4wX/23563836034.pdfIn PDF document text
    • https://cdn.sqhk.co/worenora/1UijxYY/police_siren_wav_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/crjigeq/jam_league_basketball_hack_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wupaxozejite.rf.gd/kadar_caruman_sip_perkeso.pdfIn PDF document text
    • http://felubefetixiwu.rf.gd/algebra_quadratic_equations.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED31 2952 bytes
SHA-256: d8b907802410e675ceca2784509e58a9dae2947c1b2ad43e3e0c02687eabed47
font_01_sfnt_off0000f7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BF 5400 bytes
SHA-256: ace8c9506b2e5800617a7c867a22164fdded557bc8c030a93cca0f66bbdee437
font_02_sfnt_off00010a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2F 2904 bytes
SHA-256: 54dc924f879ed509c8021f36815774a7bfa81c2febd7cedcbd7c573b524f6ec4
font_03_sfnt_off00011625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11625 10364 bytes
SHA-256: 5360ada65f9c4165a3c0fa3c4f0848342a00ac321f42f8988bf30f2654e16bc9

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