Malicious PDF — malware analysis report

Static analysis result for SHA-256 24026bf73f78f711…

MALICIOUS

PDF

98.1 KB Created: 2021-03-12 22:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d3b8e30561f51b1127ab0c03d7fcc662 SHA-1: 90c9667cdc936e6a26653feed5fbe711fb2f5185 SHA-256: 24026bf73f78f711830c3fbcf3805e4ee63d4ce944a5ada77134f50997fb4dd5
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://ponafet.ru/award?keyword=writing+task+2+questions+pdf PDF link annotation
    • http://copyright-security-ig.com/gurps_4_character_creationil8s3.pdfIn PDF document text
    • http://smartbright.club/6395880415z5sn5.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/37624023427hk3iq.pdfIn PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/858f4baf5deccc.pdfIn PDF document text
    • http://zujugowez.iblogger.org/best_soft_serve_ice_cream_machine_2020.pdfIn PDF document text
    • http://eliyalte.com/instruction_manual_brother_ls_1520_sewing_machinejwh3i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485578/normal_5ffc4a2a71b0f.pdfIn PDF document text
    • http://zipibafof.iblogger.org/6781467772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467032/normal_600d917858b40.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/7559c1271f8447e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412599/normal_60462c9eaf891.pdfIn PDF document text
    • http://onatural.space/nejikupuzorokefakipunemaiwvme.pdfIn PDF document text
    • http://lestyprin.online/little_fires_everywhere_synopsisg27g9.pdfIn PDF document text
    • http://beamorem.com/zilosezugejalafejodokix0xn6f.pdfIn PDF document text
    • http://hook-up.fun/8_ball_pool_unlimited_coins_and_cash3hquc.pdfIn PDF document text
    • http://price-list.moscow/rabox9n4ok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_6039f4472dd30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384484/normal_60265d3d5632a.pdfIn PDF document text
    • http://reduslim-ordina.site/philips_universal_remote_codes_for_sanyo_dvd_playerijzkd.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://s3.amazonaws.com/xupizewuxere/tokyo_ghoul_seasons_in_order.pdfIn PDF document text
    • http://tiwufuwivuvuf.epizy.com/game_call_of_duty_3_ppsspp.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/85052213380.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/wakalutorujodutazafar.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_off000136f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F7 5392 bytes
SHA-256: f774c380b9fd2db5bb0b868d98428d13ec3b744fbbc841122bf4f662557de415
font_01_sfnt_off00014962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14962 10288 bytes
SHA-256: 10bedbd96686234725ca3505d460e2f18136b43615a16878c5fbed4780c925cc
font_02_sfnt_off00016c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C9D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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