Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b13956cc9abc13d…

MALICIOUS

PDF

79.0 KB Created: 2021-04-06 17:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 974c793d63ffeaea3c84d2d04d5a6632 SHA-1: 23785e51d559c53ac1acbbdc83da1fff7cd13114 SHA-256: 5b13956cc9abc13d652180e8ecb0e018dcc5a756f245c8db80d22de42dd50bee
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains heuristics indicating it's a link farm and uses a lure to trick users into executing commands via copy-pasting into a shell. The embedded URL suggests a phishing attempt related to password reset instructions, likely a pretext to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://lozipotod.ru/award?keyword=how+to+reset+windows+7+password+using+command+prompt+pdf PDF link annotation
    • https://cdn.sqhk.co/zikonidenijo/ejhjaVW/best_free_ringtone_download_app_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/nemazuwigumo/8mgighh/rising_evil_scary_granny_ghost_horror_game_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_603e9beb87a49.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/jihfjiu/16853951.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/UXVtl2t/ruzijifojidipisi.pdfIn PDF document text
    • https://cdn.sqhk.co/liramesot/lrtm6vn/flip_animation_in_android_xml.pdfIn PDF document text
    • http://afracheat9.xyz/malayalam_song_ambalamillathe_aaltharayil_vaazhum0y7nm.pdfIn PDF document text
    • http://cg-designer.xyz/kamiwixewulig13dqp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474475/normal_5ff6af17ca1d3.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/ichgEij/messenger_lite_download_9apps.pdfIn PDF document text
    • http://com-signto5.xyz/livefazimev3z7f5.pdfIn PDF document text
    • http://pro-konditer.com/audiolibro_el_poder_de_la_palabra_habladauddl3.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikebepo/LY4igS0/38614382076.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/21f7ba5b-8727-461c-b90b-e11e2edb79ed/resumen_breve_del_libro_las_chicas_de_alambre.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/dragon_age_the_stolen_throne_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65f8342a-3ed4-496f-ad0e-7c0024582572/25304282345.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/reraridij.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/chicago_manual_of_style_writing_out_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d7c5171-6e82-4b41-9e84-3c883ce37f54/61342897673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce12d80e-bb0a-45da-bca8-4c1ca5d9be2a/how_to_charge_my_mophie_powerstation_xl.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE931 5460 bytes
SHA-256: 47544d410f6171063f6e45d4deb05aec1d60126e25e71ef5fdffb71b0b7d501d
font_01_sfnt_off0000fbc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC3 10584 bytes
SHA-256: f960750e8c3f582c04c0ff36116bc2de3d70c466b1414aa2d111c02c7dd8126d
font_02_sfnt_off00012004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12004 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3