Malicious PDF — malware analysis report

Static analysis result for SHA-256 c732f3ffcc32a6dd…

MALICIOUS

PDF

78.2 KB Created: 2021-05-02 14:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 49a92d9d8445c0731720f7e9cb102a6c SHA-1: 052bc6397064141de0c36f38aac52407ecad53df SHA-256: c732f3ffcc32a6dd4ac1a3def5c7a1d79e47a4b9cd5173abfa1ae74da185293f
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous embedded URLs, including suspicious domains like 'midufefew.ru', suggest the document is designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure itself likely facilitates these redirects, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/strik?utm_term=where+is+the+filter+located+on+a+coleman+furnace PDF link annotation
    • https://rakumimow.weebly.com/uploads/1/3/5/9/135957304/pobexusasedov_wototiz_fasipefamofafeb_vufadevujuviziw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384463/normal_604e04d05b040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423148/normal_5fe791746d928.pdfIn PDF document text
    • http://nexipufogavajid.getenjoyment.net/36535235873.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/misunderstanding_analysis_of_covariance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473379/normal_603bb1cd39a17.pdfIn PDF document text
    • https://bupulaserora.weebly.com/uploads/1/3/1/4/131437689/aa5c34c.pdfIn PDF document text
    • https://kazikuxixaremu.weebly.com/uploads/1/3/0/7/130738513/ebd295ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422168/normal_5feb0783ec71f.pdfIn PDF document text
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/6627562.pdfIn PDF document text
    • http://xopivodez.22web.org/fernando_alonso_cycling.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/cambridge_english_empower_c1_teacher_s_book.pdfIn PDF document text
    • https://dugizixenopiloj.weebly.com/uploads/1/3/4/4/134457585/pofakuroribamot.pdfIn PDF document text
    • http://wokulorumal.iblogger.org/metilofukarapodode.pdfIn PDF document text
    • https://pepevifive.weebly.com/uploads/1/3/4/4/134480859/eb94f709aaac0b2.pdfIn PDF document text
    • http://zemawage.22web.org/24027248356.pdfIn PDF document text
    • https://dijuwinepogiw.weebly.com/uploads/1/3/0/7/130738679/be0bd007b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://worugapefa.epizy.com/bujeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad505fde-7bde-4f56-b08b-e7887c477676/will_there_be_any_harry_potter_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5681607-a13e-435c-898b-62de9e22e3ea/rikagosivilivowubiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8970e877-8d61-45d0-a474-3b8a120b43b7/toyota_corolla_2003_radio_wiring_diagram.pdfIn PDF document text
    • http://xowilewegiwo.myartsonline.com/roburorosufed.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_off0000f44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44D 5272 bytes
SHA-256: 98b7eddd97163174c42390a2fc8d306315cdc4d2989a6458ac5f633ad167ac14
font_01_sfnt_off00010621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10621 10756 bytes
SHA-256: 941ca23a1db744f7a2b707beef60f8125e86b3348b1f4b6159e973853931a003

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