Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae19ef566410d8d…

MALICIOUS

PDF

83.5 KB Created: 2021-03-21 08:04:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4ee995122f537c559d11b283ed87abb9 SHA-1: faba3b1cdc0a22c86c4847bcfd19de6bc68c9b6a SHA-256: bae19ef566410d8dc0f5994c8993919c92fbf0f70204a6e3fb97b40b627bdb20
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services and redirectors, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to deliver malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=acorde+de+re+bemol+en+piano PDF link annotation
    • https://cdn.sqhk.co/kixagixupo/c8OOggT/36514935374.pdfIn PDF document text
    • https://cdn.sqhk.co/fivufotimad/jehaOyX/zupuwuganojomekuzujegike.pdfIn PDF document text
    • http://reform-st.ru/wupufebuwijawulazugejig1dywq.pdfIn PDF document text
    • http://arevakar-travel.com/free_digital_marketing_plan_templatezul6p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5fdc2b777d472.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/41790360783397nr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392864/normal_5fc7fb9c98475.pdfIn PDF document text
    • https://zagibekopawof.weebly.com/uploads/1/3/1/4/131453283/398393.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/1nI1jdH/86814032023.pdfIn PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/bc1b9559c73043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383444/normal_5fc85b4db9411.pdfIn PDF document text
    • http://detonic-ro.website/davitolokosarolexil24v2.pdfIn PDF document text
    • https://sozazoje.weebly.com/uploads/1/3/1/1/131164180/buxemofosa_pefetut_gafulasabovo.pdfIn PDF document text
    • http://bonmarket.site/melvyn_bragg_twelve_books_that_changed_the_worldzo5uu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://towuvoti.epizy.com/58660867102.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/55895484265.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/how_do_i_program_my_comcast_remote_to_control_volume.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/rezaleg.pdfIn PDF document text
    • http://povojenase.rf.gd/vexesopikumodax.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/wejonitatut.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DD 5172 bytes
SHA-256: 6ebb9dc526e36feae0f306d3e6d308b10b3d6a6346672204847a95547caef7c2
font_01_sfnt_off00010255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10255 12008 bytes
SHA-256: 532e36f7da74fef6273eb15d000fc8515f781ce04520a26a87ea9066e20e3c49
font_02_sfnt_off000129e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E5 16120 bytes
SHA-256: 184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832

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