Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f97d4918c50dcf9…

MALICIOUS

PDF

78.1 KB Created: 2021-03-09 20:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: bb829ccf29e0f280dfa3bad9dc474308 SHA-1: 264f2202adc0a9cc01791d02a218697d57d4a3f0 SHA-256: 3f97d4918c50dcf9ac99b8c1183cd39173e8b8af9341bdc8f89d7cd63b9bcf78
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan-like behavior. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the overall structure strongly suggest a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/wix?keyword=final+fantasy+v+blue+magic PDF link annotation
    • http://reduslimitalia.site/sulujorijipafwb.pdfIn PDF document text
    • http://marketitaly.pro/how_to_change_mobile_home_furnace_filtersfk1ao.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_603167b7e0f99.pdfIn PDF document text
    • http://vandify.com/rheem_gas_water_heater_manuals4rg7.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/72804354082kz359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501770/normal_60108dd6b4716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372740/normal_60247736200bd.pdfIn PDF document text
    • http://naturaitalia.space/mepomidogekobipiwlaqpt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388596/normal_5ff16abd596b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492555/normal_5ff9f494b0380.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481409/normal_5ff2bf6e8b342.pdfIn PDF document text
    • http://evatopshop.xyz/cheats_blood_omen_2_pcdo8cs.pdfIn PDF document text
    • http://afterdealer.pro/warlord_games_victory_at_sea_rulesxejts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377912/normal_5fc5a11c955eb.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/00232c1c-fb63-45ed-ae1e-f38132702ae5/skyrim_ps4_tips.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_cb0f32f4bb9e438586b3f105211b854f.pdf?index=trueIn PDF document text
    • https://981168d4-05fc-44b6-871d-73371d7e8cf1.filesusr.com/ugd/87d215_83c36b3819df4cbd89b4c63d421b8e2b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/730219f1-21f3-4230-a28e-e50793c39859/diary_of_a_wimpy_kid_long_haul_rotten_tomatoes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b93a88-a427-4dda-86d9-d37c1e9817c8/feocofeco2_reducing_agent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e752156-c347-4452-8b70-59d8e530e29c/tricaster_460_back_panel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64698181-6701-4ade-8c9d-b99c88075638/vejiwufokovijivoje.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_off0000f4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F9 5364 bytes
SHA-256: bf6287a87daf38d9615967b6a53608bb315d8369a26fcd0485c9413ef2131896
font_01_sfnt_off0001074a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074A 10408 bytes
SHA-256: 99441b1e74b1bb614ac859b4083b5c9aaf3ccc5c23376470e5204f17a60f8526

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