Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6442f5b4261506…

MALICIOUS

PDF

96.1 KB Created: 2021-04-07 20:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b7989f656d7317242e079ed318fdaf5e SHA-1: 2758d030c60745b6c6f87f9a32b4f877eb3934aa SHA-256: fd6442f5b42615068c528adfb65fd420bf416034e4aab3186dfe11919300250e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains embedded links that redirect to known malicious infrastructure, suggesting an attempt to phish or deliver further malware. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+old+do+you+have+to+be+to+work+in+rue21 In PDF document text
    • http://plsale.pro/62931129827v9dn4.pdfIn PDF document text
    • http://lifeeuro.info/79663625080ohsi1.pdfIn PDF document text
    • http://it50discount.pro/dimuwosizoficyp12.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/what_is_fairness_and_justice_in_ethicsx2wsg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_697ab5febfd84c82ae121517912321b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/52e609d4-c3fe-46c6-9f5d-1eb71138302e/krugman_and_wells_economics_4th_edition_answers.pdfIn PDF document text
    • https://93641f3c-03d3-4c8c-b6db-0fd9bfabe798.filesusr.com/ugd/384ca7_0bf889bca2434e618a3aae82ff632500.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/didomazexekosovavilu.pdfIn PDF document text
    • http://zatozegajuzu.epizy.com/hp_photosmart_7520_printer_ink_cartridges.pdfIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_97addb310ea14bac9b35be598986764f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/28530337770.pdfIn PDF document text
    • https://e2a3f85e-3ce8-4c76-99a2-e63219cad5ad.filesusr.com/ugd/473d25_095035946b854558963e7d5ed3f4167a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a19c47c-bac8-4e0b-af42-1a6b494dff47/xejakonan.pdfIn PDF document text
    • http://wukusagabibumaz.rf.gd/mipikefajiwakem.pdfIn PDF document text
    • http://zovifutokivula.rf.gd/human_anatomy_lymphatic_system.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/zubabuverab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b8b2e14-51ed-456e-a502-9b2d5a0135e2/25191724764.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/66966868515.pdfIn PDF document text
    • http://guluvuto.rf.gd/runuwufoxuwanazil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/490a4bbf-e274-4881-baa2-bf279cf85a8c/first_alert_smoke_detector_9120b_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ac61317-2c89-4fd8-b9b4-910d28b9d85f/how_to_make_a_pizza_procedural_text.pdfIn PDF document text
    • http://tidewoxawutose.epizy.com/android_9._0_google_play.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/nulelaxovezalebuzoxid.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12372 5340 bytes
SHA-256: dd749dce1db125dcba8992716b5f1c210087e9e42770e9defd48caa12eac72f8
font_01_sfnt_off000135ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135AC 11656 bytes
SHA-256: d3d5a76118a1698a0f76a082056607f5573c1027aa03f3a93fc090b3094d4652
font_02_sfnt_off00015d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D7C 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61

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