Malicious PDF — malware analysis report

Static analysis result for SHA-256 250082a3f3610f7e…

MALICIOUS

PDF

85.8 KB Created: 2021-04-21 18:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 448a97a36435834ee1ca2f41b7251bdf SHA-1: a216b37f14f188036f832bc9cf06359820155472 SHA-256: 250082a3f3610f7eeff8f546df256ad867d4c83d02d1461f65350b51d3f86190
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one specifically identified as a potential phishing or malware distribution link. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to host a large number of links, likely to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=mr+coffee+coffee+maker+ratings PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5fd107c4d0505.pdfIn PDF document text
    • https://towelekuw.weebly.com/uploads/1/3/1/4/131406253/vugevarozatagif-tejejizotodota-xoxaneruwil.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/tgcViex/21328276745.pdfIn PDF document text
    • http://tapagigozi.medianewsonline.com/april_2020_current_affairs_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402932/normal_5fc84001479d3.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/MlZvYge/download_cheat_ultimate_motorcycle_simulator_mod_apkpure.pdfIn PDF document text
    • http://rosirodefi.iblogger.org/comparative_balance_sheet_of_a_company.pdfIn PDF document text
    • https://lerinaxupol.weebly.com/uploads/1/3/4/6/134662503/wuruzonalomewil_renonufabemuta_fevuta_zesazore.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/cKjgtji/download_dragon_village_cheat_apk.pdfIn PDF document text
    • http://gawudubigojan.getenjoyment.net/krishna_auction_theory_second_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/wazuzofi/5gjQGih/drum_machine_pad_hardware.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456119/normal_600bc9cd97e5a.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://16b16ea1-1eac-4681-bfdb-39d0b7b0c60a.filesusr.com/ugd/d6b497_df367d6b8d7346baa5cdac9ef91b5af4.pdf?index=trueIn PDF document text
    • http://sedunadilame.rf.gd/latex_beamer_include_slides.pdfIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_f280f1af54394b61ab0f0030b9840f74.pdf?index=trueIn PDF document text
    • http://mafilijesov.epizy.com/edit_text_with_same_font_online_free.pdfIn PDF document text
    • http://naremijex.epizy.com/zebaninuzobov.pdfIn PDF document text
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_6d007197913d488c89167c7895b77685.pdf?index=trueIn PDF document text
    • http://vefodipox.myartsonline.com/king_kutter_rotary_tiller_parts.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_off000106c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C3 5028 bytes
SHA-256: a967c308b6b4c3e2795d4dd40eba4d975ac582fb2ea880531b7472acfd66895c
font_01_sfnt_off000117c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C4 10728 bytes
SHA-256: 4b123bc4b085b9c94fe7bfde5797c05c1be01b63b9c7694c21859ed39a8e4f8e
font_02_sfnt_off00013bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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