Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2ea83c838ef8c1…

MALICIOUS

PDF

82.2 KB Created: 2021-03-20 03:47:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1984992c6615811e2e76297b4c85f545 SHA-1: 9193174202c5bf4eceb31730cf6f2b6d396b6c6e SHA-256: 3f2ea83c838ef8c1c7781914cb593de64f3267f4b1a796a16a489b938cab67a0
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. One of the primary external links is to 'https://gimoguvi.ru/strik?utm_term=how+to+replace+kitchenaid+igniter', which is likely a lure for phishing or malware distribution. No scripts were extracted, but the PDF structure and link farm behavior are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=how+to+replace+kitchenaid+igniter PDF link annotation
    • https://silajawa.weebly.com/uploads/1/3/4/3/134339193/c5389c2cadc.pdfIn PDF document text
    • https://pulufakifene.weebly.com/uploads/1/3/3/9/133999255/potiz_gagatekarabo.pdfIn PDF document text
    • https://cdn.sqhk.co/jebozibiru/8idTiaP/54291722028.pdfIn PDF document text
    • https://gapidegit.weebly.com/uploads/1/3/1/3/131379699/6819465.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/jQVjHhf/get_acc_e55_repair_lift.pdfIn PDF document text
    • https://cdn.sqhk.co/kixepijap/difiajj/tesoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/hCStigm/17569719035.pdfIn PDF document text
    • https://cdn.sqhk.co/pudinivil/cbiejho/free_online_casino_slots_with_bonus_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/hbA6hdZ/vodobanka_pro_apk_android_oyun_club.pdfIn PDF document text
    • https://cdn.sqhk.co/xeviremal/gighzhe/abc_song_in_spanish_military_style.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/kiwojif.pdfIn PDF document text
    • https://cdn.sqhk.co/nujobuja/m1y0rZZ/xojekaxefudupivod.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://uploads.strikinglycdn.com/files/449c2bce-e51f-4725-832b-559d4c4c0ecd/samsung_galaxy_note_4_price_in_pakistan_whatmobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfbdc883-5604-431c-ab11-921bef031943/weight_watcher_food_scale_manual.pdfIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_506304c929dd42898e6cdc84da061b61.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c23c35-f21b-411a-b9e4-da2ee59177ba/86093307235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c2cd9c-61e1-410a-af87-100320e77663/what_does_covered_call_strategy_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8515e3e-511e-43cc-b048-142afb85cf51/jexojulomejeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e963ecbf-d517-45d4-8ab9-5760d6e9a9b1/define_the_three_types_of_plate_boundaries._how_do_they_move.pdfIn PDF document text
    • https://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_111dac6fb89747b487d90f1579cc183e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5d0ce2-4bda-4064-97cd-17cc79c9a4ff/96375624405.pdfIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_acb021fa284641c889ecff0bed9b9af0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3791c85e-752c-4a61-ab39-20266fb7622f/67229260487.pdfIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_c0413fa097b44167b7c8e14de2167aee.pdf?index=trueIn 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_off0000f6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C3 5064 bytes
SHA-256: 025a566b5c1157b6a35f51a34197fb27e5ae835c5779a0cf9773424cdd788e17
font_01_sfnt_off000107f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F7 10808 bytes
SHA-256: 0ed73cb02a8f7c413a733a078ae911136646fd15c3e007e37b8b7c0b3f471c03
font_02_sfnt_off00012cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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