Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc5609b9ddf7f39…

MALICIOUS

PDF

76.8 KB Created: 2021-03-22 20:05:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6153a984e03fd61b1912bd828f5635c4 SHA-1: 8062f71d3047bb0c9711d40e2f17af31ad35d2aa SHA-256: 2fc5609b9ddf7f39ebbb3493833a55f89aac6b1f03a0f79f87f306e3e925319a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://bologen.ru/aws?utm_term=when+in+jail+in+monopoly+do+you+still+collect+rent PDF link annotation
    • https://cdn.sqhk.co/nowavutu/wjjhijj/download_free_zombie_attack_games.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvomafoda/Wgdhbpp/xogunupikowogujurugabodi.pdfIn PDF document text
    • https://cdn.sqhk.co/pivifilogopa/Hhjghjc/editing_exercises_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/raserijene/jfgeehj/zombie_frontier_3_sniper_fps.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/MidPhih/cobra_snake_hd_wallpaper_download.pdfIn PDF document text
    • http://tejidirexe.mywebcommunity.org/cavite_mutiny_reflection.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/aRifkhc/sound_equalizer_for_pc_windows_7_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/boxumiza/Vghq5Xe/big_win_basketball_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/xubafofin/hahdxja/smoked_plexiglass_sheets_lowes.pdfIn PDF document text
    • http://guwejino.iblogger.org/falujaw.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/the_crown_season_3_episode_7_church.pdfIn PDF document text
    • https://cdn.sqhk.co/josedinis/g2Cif0b/12676015592.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/gf6idr6/debalazomusebikilevuv.pdfIn PDF document text
    • http://zuwazari.22web.org/avg_mobile_security_premium_apk.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
    • http://sisawujeza.rf.gd/biomes_of_the_world_packet_answer_key.pdfIn PDF document text
    • http://xuwinesesat.epizy.com/free_download_ethiopian_amharic_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf2fde0f-d23c-4ae0-a10e-9a1c53b01028/the_republic_of_texas_is_no_more._what_event_caused_this_quote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3792e914-79a4-4627-acd2-634f9b654f4c/vemukesobonepusamuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22a0abc-e8a6-41cd-a5c2-e50a59ea827d/average_salary_of_compliance_officer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7730cbee-d24a-4723-b834-04d603f93253/craftsman_garage_door_opener_gear_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3613aff-4c00-45a9-a6e0-f99064e752cd/zakuruzulakamok.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_off0000e268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE268 5388 bytes
SHA-256: 700441a8ce7d1f4738bb0c16f98a21a02d6f3c34b25a65fdf2da86918fb658be
font_01_sfnt_off0000f498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 10172 bytes
SHA-256: 2d60b1d527160d4c5c3aefbc59b34387a485a80bfb198e62730e83acd22d09cc
font_02_sfnt_off00011773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11773 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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