Malicious PDF — malware analysis report

Static analysis result for SHA-256 86af3f78641224f5…

MALICIOUS

PDF

71.4 KB Created: 2021-02-23 10:22:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 43e0a851e6f785403bc354ce4860614e SHA-1: 7c3601768332dca46ea678b2575b40176f25d936 SHA-256: 86af3f78641224f54e609e9ad142519ff29418ae66ea8877c5ce662443cbca67
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://crophysi.ru/wix?keyword=movie+hd+apk+download'. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The presence of a visual download button lure further supports a phishing or social engineering attack. No scripts were extracted, but the malicious URL and detection indicate the file is designed to lead the user to download a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/wix?keyword=movie+hd+apk+download In PDF document text
    • https://cdn.sqhk.co/gefizorabubi/ifghQBY/top_league_soccer_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/HHjefhg/69051577767.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/T0iddgc/parkour_runner_dies.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/gdPOzji/rikilelumipokirizukuno.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/eyhcjdj/need_for_speed_no_limits_apk_obb_zip.pdfIn PDF document text
    • https://cdn.sqhk.co/balekunu/aOAge0t/59686595706.pdfIn PDF document text
    • http://dazomasuw.22web.org/jabulak.pdfIn PDF document text
    • http://zuvakaxosamota.22web.org/hematology_book.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/hiJidjB/road_racing_car_racing_cartoon.pdfIn PDF document text
    • https://cdn.sqhk.co/wetaxawirewu/e2AA0lw/champions_hockey_league_wins.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuputid/dGjjhjN/block_fortress_war_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/xalibolopov/cxYTnUP/service_arizona_vehicle_sold_notice.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/hgxrojj/1st_birthday_cake_designs_for_boy.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/hWgchjJ/koala_kai_commercial_actor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piterar.epizy.com/37770426867.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/23534383114.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/gigobawixijawisonek.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/ruxobilebolazenutuwowek.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/chase_rice_ride_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/ds_emulator_android_pokemon_diamond_cheats.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_off0000dc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC66 4996 bytes
SHA-256: f4756748910f7eadcae32f069104f4e588c6c8c53e364321ffb6439b93cc8d93
font_01_sfnt_off0000ed83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED83 10184 bytes
SHA-256: 3280924e9543c76e09e7ad8e426d54aad8d336707dda433fd3682879bc99583a

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