Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f8a2d411e94a6b…

MALICIOUS

PDF

77.7 KB Created: 2021-03-27 12:49:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: eac0e3696af3151e253494be525cad49 SHA-1: ca3612e0f8056703c8b06d39e1f6a67ec452b5fb SHA-256: d0f8a2d411e94a6ba18c87624a7d2b1fac9b2594a80d9a5944f2097b63de1988
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, embedding numerous URLs that likely lead to phishing or malware distribution sites. The document's structure and the presence of many external URIs suggest an attempt to redirect users to potentially harmful content, masquerading as legitimate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/123?utm_term=bicep+curls+barbell+form PDF link annotation
    • https://cdn.sqhk.co/keropolor/8jbidPW/stickman_warriors_fight_gift_code.pdfIn PDF document text
    • http://najezeb.22web.org/american_english_file_1_student_book_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/hgURzpd/zombieville_usa_2_co_op.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/jeiiehi/gatibejidolageraravazavob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416150/normal_5fe12911ad519.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/Fib3hhf/tetris_effect_the_complete_soundtrack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486042/normal_5fdc74ea2aa3e.pdfIn PDF document text
    • https://cdn.sqhk.co/mebinolopuf/5PhhdzO/melevegakave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403410/normal_6019a09c5abe1.pdfIn PDF document text
    • https://cdn.sqhk.co/mitejapeki/C5japid/32683680467.pdfIn PDF document text
    • https://cdn.sqhk.co/bibolaned/gZieqic/lufubilenite.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/hb71gcG/34593515691.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/lhdhfge/navubexoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_6052562a1ec08.pdfIn PDF document text
    • http://tubunasozejut.22web.org/cs_go_android_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_5fd949fc586d6.pdfIn PDF document text
    • http://boothattendant.com/xabojipufogebof9gtip.pdfIn PDF document text
    • http://subuvotugijad.iblogger.org/archive_outlook_emails_to.pdfIn PDF document text
    • http://help-nanny.site/supegafuxezugumuggiw2s.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/gyYwgdb/king_island_game_map.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://voginafukut.rf.gd/new_shooting_games_2019_uptodown.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/bibawo_by_kenzo_mp4.pdfIn PDF document text
    • http://sixexelotu.epizy.com/after_we_fell_read_online.pdfIn PDF document text
    • http://jiwabesufag.epizy.com/dakovapox.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_off0000f2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D9 5348 bytes
SHA-256: b3d8aa63a894bf73199aea00ac316c469bbbf6aa40e527101b2e4055b9c9b654
font_01_sfnt_off000104f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F1 10704 bytes
SHA-256: 00e7a9e35d1701ef5b6988b28181309e862e51590a52ab84d08bbc18f11ceb0a

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