Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe121f71aaf1d8e2…

MALICIOUS

PDF

77.7 KB Created: 2021-03-23 08:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0902da32914b9a2b243df8f9fead6b1e SHA-1: 5ab73f6f4edfaf4216ce1814c5e3bcf0dcd4d1ad SHA-256: fe121f71aaf1d8e2a6709b4b348a9c119477070a1396f23cda94797377be82de
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The embedded URL points to a suspicious domain, likely serving a malicious payload or phishing page. The document body, though heavily obfuscated, contains keywords related to the URL, suggesting a lure to trick users into visiting the malicious site.

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://vilenefex.ru/award?keyword=antibioticos+carbapenemicos+pdf PDF link annotation
    • https://cdn.sqhk.co/sujubowip/ciegcgf/63111618459.pdfIn PDF document text
    • http://xutefizil.getenjoyment.net/zodomabexasigipufoge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473403/normal_5ffbfedc83c29.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/ENijgdC/bass_booster_online_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/hiTgjWt/dutujirigik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451970/normal_600c8dc0affa3.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/aidlgdp/metro_smart_card_recharge_mumbai.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456134/normal_604b796123526.pdfIn PDF document text
    • http://mosuxuvemuzuwex.mywebcommunity.org/5g_backhaul.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/high_concept_character.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383460/normal_600a61fe62d78.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/616fc1e7-304d-4459-aacf-e120d601b953/words_what_begin_with_ow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3466e108-eae0-442a-8aec-4a2a0c8d0d22/84127874849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a60aefc5-1046-40b4-8126-0d072fd70cff/hoover_nano_cyclonic_foam_filter.pdfIn PDF document text
    • http://kubomefewofumim.atwebpages.com/apex_office_furniture_catalogue.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/the_crying_game_meaning.pdfIn PDF document text
    • http://dusameferadulo.onlinewebshop.net/laryngospasm_anesthesia.pdfIn PDF document text
    • http://luvepel.myartsonline.com/9881811037.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_off0000e0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EB 5184 bytes
SHA-256: 158c5297fb8193c905ce3b4974a41f624ee991143babf55b6cf2be64439de20a
font_01_sfnt_off0000f25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25C 12224 bytes
SHA-256: 44832e3b41104ad94e529d2e60fe6c87735423c216526f94b3f66ae3fd464425
font_02_sfnt_off000119d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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