Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e585364073af255…

MALICIOUS

PDF

77.5 KB Created: 2021-03-14 17:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e586152eb02cc8dcf4eb76126ac07f4b SHA-1: 4e497fd78a6365c977436ea8f9f2b051631d917b SHA-256: 2e585364073af2552bb1cac1c0eca3ce07c52691e41eef8a30b31e075b5c7fad
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 domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=how+to+use+olympus+digital+voice+recorder+ds-5000 PDF link annotation
    • https://cdn.sqhk.co/vifamepupib/gcRZeCr/idle_air_control_valve_replacement_price.pdfIn PDF document text
    • http://jetiloxabutu.iblogger.org/lil_bow_wow_puppy_love.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/zusokudu.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/hkgjzhe/critical_survival_desert_shooting_game.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/spelling_activities_for_2nd_grade.pdfIn PDF document text
    • http://electriccannoz.club/72984422328irac0.pdfIn PDF document text
    • http://hairhome.moscow/tesla_model_3_used_for_sale_usape4tx.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/43819878159.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/ejercicios_con_adverbios_de_frecuencia.pdfIn PDF document text
    • https://kamedewogivazu.weebly.com/uploads/1/3/4/0/134096977/a5c8e4ce767c5f.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/the_god_ask.pdfIn PDF document text
    • http://irisca.online/raja_babu_bhojpuri_movie_video_song9126i.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
    • http://zubiluwetij.myartsonline.com/binesi.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/talk_like_ted_by_carmine_gallo.pdfIn PDF document text
    • http://romezegipoxo.epizy.com/single_replacement_reaction_worksheet_4.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/gifekolobujilumadulidakik.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/adjusting_journal_entries_in_quickbooks_online.pdfIn PDF document text
    • http://soxosodazafu.epizy.com/nukitatuxebazoni.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A5 5680 bytes
SHA-256: 56bd9c0a54a22f30b19f9d6f0400c86f2cce79ce886c6de9608a01973005f856
font_01_sfnt_off0000f62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62A 10664 bytes
SHA-256: d21d20237b670423c4a902b5175c2b7fb1803d001ebd29b4fc6982cbaa201886
font_02_sfnt_off00011a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A81 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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