Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4bcf4dc225a0baf…

MALICIOUS

PDF

108.8 KB Created: 2021-03-14 17:37:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6672f1248b9770bc786bcbf674db8ccd SHA-1: 08e225178e701df0f395374307525fcd94c401c3 SHA-256: c4bcf4dc225a0baf9b7ea6160e4208c94adfd446f0ca059025284013e0b12cb0
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://druttle.ru/wix?keyword=dark+fall+ii+lights+out+director%25E2%2580%2599s+cut PDF link annotation
    • https://cdn.sqhk.co/jofijoju/jjjbihV/line_graph_x_and_y_axis_scale.pdfIn PDF document text
    • https://cdn.sqhk.co/govonesed/MhgicmE/retroplay_virtual_pinball_machine.pdfIn PDF document text
    • http://bupetud.xyz/how_to_hang_weights_on_a_ridgeway_grandfather_clock993oh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5fe8217781063.pdfIn PDF document text
    • http://websporizle3.com/gateway_b2_teachers_book_free_download4fmej.pdfIn PDF document text
    • http://nuveclovet.xyz/25779950029l3d4m.pdfIn PDF document text
    • https://mogopefisumiba.weebly.com/uploads/1/3/5/2/135295831/gosagukaxosu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380883/normal_6006033cd6f45.pdfIn PDF document text
    • http://fullpisetc.ru/7440678202vmk7a.pdfIn PDF document text
    • http://easycreditscore.info/sejezifusim7ua6u.pdfIn PDF document text
    • http://pumba-timon.space/259056662661h5hd.pdfIn PDF document text
    • http://biomanix.best/how_to_reset_kenmore_70_series_washerkt4p4.pdfIn PDF document text
    • https://fofonamid.weebly.com/uploads/1/3/4/8/134869219/2a64d0e6d6.pdfIn PDF document text
    • https://cdn.sqhk.co/vubiwete/ijPggIE/upcoming_shooting_games_for_nintendo_switch_new.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454561/normal_5fe20571dcbe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_601f88ba31aa0.pdfIn PDF document text
    • https://cdn.sqhk.co/semexixok/iBiezhf/kemod.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/gQCXKgd/boduzuk.pdfIn PDF document text
    • http://sakhavto.ru/jivozoveriix6wp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91e98bf-0626-42d3-8ad0-fda7fb93fc7c/how_to_reboot_a_fios_router.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aceab88-c98e-4a03-840f-62f83cc4341d/towebijanunavutikuluvez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15be24a2-50be-4797-9113-7f251f65d368/workpro_1000_chair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f49b6ca8-c97a-4055-8839-6b669b415505/25996532665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14615e09-1a37-479c-8452-cbdf7a2a17ad/how_do_you_eject_disc_from_xbox_one_s.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_off00016b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B1F 5396 bytes
SHA-256: 87f366a43e96f26acf8dd77f764d621d2af9d290def3691668eb524f737bfe0f
font_01_sfnt_off00017d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D88 11116 bytes
SHA-256: 7f5b2c3b9f8845b0e78762875fb566b7429b5dd40f2fc5e02b9673475e2521aa

Open this report in the interactive analyzer, or submit your own file for analysis.