Malicious PDF — malware analysis report

Static analysis result for SHA-256 946aef265ae3a9bc…

MALICIOUS

PDF

77.1 KB Created: 2021-03-27 20:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 166c7202f9a019aff0b836e07868035a SHA-1: 43dc75840b282b502e8dc704dc351616e0c55650 SHA-256: 946aef265ae3a9bc4e020a8d85265b8a9e76edfaab695c5740a4920ea3806652
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains text related to search terms, reinforcing the lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=beats+solo+pro+review+amazon PDF link annotation
    • http://byseles.xyz/game_coding_complete_4th_editionx9djz.pdfIn PDF document text
    • http://livobagoxepat.iblogger.org/dictionnaire_franais_anglais_finance.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/kakukakodiw.pdfIn PDF document text
    • https://cdn.sqhk.co/xeliwiwogivo/2jdvLto/natusimosazuwotevul.pdfIn PDF document text
    • http://kasyanbeauty.com/minn_kota_talon_151zii5.pdfIn PDF document text
    • https://cdn.sqhk.co/jozopotuwomo/hVGEged/super_simple_shopping_list.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/navy_basic_training_base_in_illinois5inmm.pdfIn PDF document text
    • http://cancandance.org/69558358466luk3u.pdfIn PDF document text
    • http://sluzhba1.net/taco_bell_crunchy_taco_no_cheese_caloriesjgyvf.pdfIn PDF document text
    • http://giwosoto.sportsontheweb.net/computer_screen_repairs_cost.pdfIn PDF document text
    • http://detozube.scienceontheweb.net/technical_writing_process_kieran_morgan.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/ahgmToX/ponamizubozetumokoji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://naranosufok.atwebpages.com/50599655039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaaa5240-8bb0-40c2-955a-9d629138fc8e/evh_5150_iii_50_watt_6l6_head_stealth.pdfIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_ba70831883a34c44aad7c8bf650196e5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6476305-b800-4b43-9722-16878ffdea84/dofaf.pdfIn PDF document text
    • http://nilikejavovop.rf.gd/uc_browser_java_versi_9._5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c96038b-4b6d-43af-84f1-2605e1e7734f/76685214571.pdfIn PDF document text
    • http://kutubuge.rf.gd/biaystok_informacje_lokalne.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/60116242144.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_01aaa06707544e0897ff1cd05a58a5a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d215231-28fc-4d1c-b88e-50dacb45b2f9/alfonsina_storni_tu_me_quieres_blanca_resumen.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_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 5216 bytes
SHA-256: 2d163e837190af00956bf83beb55dd3f25877b8c4b9c29dbde92e925dbbbd108
font_01_sfnt_off0000fd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2A 11920 bytes
SHA-256: d67f0ce44ea11d8f9803fba66e659c6d37733315d7f9d91f880fed8b71c325f1

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