Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b682dfda955777…

MALICIOUS

PDF

80.2 KB Created: 2021-03-19 10:51:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 49089c735ad4ca95b14fe324195b2e4c SHA-1: eb64b9ae407cf0f3f6c9626bca0f604d764285c6 SHA-256: 67b682dfda9557771ca2039dafe9669e3bec1983a6e284987c3a10aac26f5f9c
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/award?keyword=physiologie+de+l+appareil+digestif+pdf PDF link annotation
    • http://ionatr.space/super_mario_64_main_theme_piano_sheet_musicbnc0c.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/dhbihij/71665894670.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/e6LIHzq/1665812293.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411273/normal_5fed9a5915c62.pdfIn PDF document text
    • http://foramodosug.mygamesonline.org/97009181237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490529/normal_5fd8ce2bc450d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450434/normal_60366e409d5e9.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/jIibjd9/51210291583.pdfIn PDF document text
    • http://reduslimitalia.website/404512317153l5ly.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480595/normal_602c905adb537.pdfIn PDF document text
    • http://antonioita.fun/las_5_lenguajes_del_amor_libroi7drp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418175/normal_603ed2567b86d.pdfIn PDF document text
    • http://fsbsiod.com/firapofesodafaxebinezemetkmqoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425255/normal_5fca0ddb4e8c7.pdfIn PDF document text
    • http://rusewigojubilon.mygamesonline.org/faxoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467322/normal_5fd6eb3e7ef95.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/Vjcihih/wish_list_app_store.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445333/normal_5ffeeea1c780f.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/qrijHLB/allegiant_book_flight.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/90657b5a-bbc3-42eb-8584-d32eab5e38a9/safety_siren_pro_series3_radon_gas_detector_-_hs71512_by_family_safety_products.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51206dfc-f8ba-4e0d-befc-2f9fd4064cb4/mozuremadixijawomojirop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a7481f-1072-4f85-92a3-cae121ff4d54/53647700912.pdfIn PDF document text
    • http://dolojivek.onlinewebshop.net/antiretroviral_drugs_side_effects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e0ba64e-8f98-4128-99c7-25a7b2292500/baxiwonokezel.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_off0000f89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 5408 bytes
SHA-256: d3326b923b9320eb1f616c6d41d577c1b81aa4bb776bfb98cc6f6ecbab5d2ccf
font_01_sfnt_off00010b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B03 13356 bytes
SHA-256: 2f4118332f53c4d7b8412fb800897ceec439686556fc4fd3a4d5c0a52b650983