Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1bca6146e63588d…

MALICIOUS

PDF

77.9 KB Created: 2021-03-24 00:19:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 40ac0a5c57793d3e8780b7252fb210d2 SHA-1: bdfb15cc472e98915e1f204c35fa088c4e92b2cc SHA-256: d1bca6146e63588db71dc0118756e244ada6bccb72f0cf9afcb625bd66b4dc3c
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 0.9993

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://jottigo.ru/award?keyword=anterior+teeth+selection+pdf PDF link annotation
    • http://kalekoneta.iblogger.org/vadomabutemajud.pdfIn PDF document text
    • http://yewes.fun/namonugofil8mdok.pdfIn PDF document text
    • https://cdn.sqhk.co/kemuxilajig/gCE5hax/23477172864.pdfIn PDF document text
    • http://ketousa.site/hard_reset_my_cloud_ex2_ultrasu7t3.pdfIn PDF document text
    • https://cdn.sqhk.co/levuzivanu/jck4Aop/mugatajobebojokiwuf.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/hgxBWrU/all_sims_4_cheats_pc.pdfIn PDF document text
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/ragimonirudabuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/wetilusogaki/LQQjcib/iraga_iraga_dj_mix_audio_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_604ceaf2bc123.pdfIn PDF document text
    • http://mishabelle.ru/jefavijemox7l0p8.pdfIn PDF document text
    • https://tetagusupawuwag.weebly.com/uploads/1/3/4/5/134586179/rupisafatagis.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/wevitade-jujawijudodu-lalifugode-rozijudiro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_600ddb3f038cf.pdfIn PDF document text
    • http://goodsun.space/28833044499q079h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417643/normal_60193567942ec.pdfIn PDF document text
    • https://kanefudejezem.weebly.com/uploads/1/3/6/0/136056225/33bf7d13d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulujono/96602521107.pdfIn PDF document text
    • http://wikatamuk.rf.gd/who_translated_the_geneva_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/92151776276.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/film_anunnaki_2005.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/jinja_template_string_comparison.pdfIn PDF document text
    • http://jokokimalofov.rf.gd/trauma_release_exercises_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/catholic_answers_deuterocanonical_books.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_off0000f469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF469 5024 bytes
SHA-256: 8160d842b2eaaca70ea77928a7b27358912422ab4e0a8e0bcf8f7727e96709c0
font_01_sfnt_off0001057f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057F 10704 bytes
SHA-256: 3c03ae1b5ee2008a142d9bba8d3d8249ec7db115ea834e7a2f333cfa04beb6d6

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