Malicious PDF — malware analysis report

Static analysis result for SHA-256 334ef4133f88f740…

MALICIOUS

PDF

94.9 KB Created: 2021-03-23 03:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00590f0a1cb935c171ffd9b70dfced7f SHA-1: c99a284971d30c33d055cc471e48e5fa0d625ced SHA-256: 334ef4133f88f740c30ec04d8fdb7f2b1023593e71e09bf34e666d71e4bb1301
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. The presence of external URIs and a link farm on disposable hosting further supports a malicious intent, likely to redirect the user to a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/strik?utm_term=honda+2000+watt+generator+price
    • http://cosmostil.top/wazanugojoxataxiwjm6wq.pdf
    • http://mir23.xyz/perimeter_of_rectangles_and_triangles_worksheetyll8j.pdf
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/kizax_wogivukubex.pdf
    • http://romeoplanet.club/61404503599i886j.pdf
    • https://static.s123-cdn-static.com/uploads/4388827/normal_5ff92eeee6df0.pdf
    • https://static.s123-cdn-static.com/uploads/4446395/normal_5ff9aaf3f1111.pdf
    • http://nekretnine.site/direct_tv_remote_manualg1sla.pdf
    • https://tazusovekofuwaj.weebly.com/uploads/1/3/5/9/135969448/e26c72e2feb87fd.pdf
    • http://yesstore.pro/61293611389nd05h.pdf
    • http://xeeewq.xyz/89912029272nerzt.pdf
    • http://dsv-trening.ru/116592820hu3td.pdf
    • http://vkysnaya-eda.site/45437592338clbom.pdf
    • http://pusikoxelumide.iblogger.org/cido_cianidrico_frmula_molecular.pdf
    • http://useplafond.xyz/pentair_kreepy_krauly_prowler_820_robotic_pool_cleanerf1zag.pdf
    • https://xafasujogi.weebly.com/uploads/1/3/4/3/134374351/1641784.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nirepuxakidogu.rf.gd/windows_10_size.pdf
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_cae40e90de4c4915ad8fe8285c9be601.pdf?index=true
    • http://walevuzu.epizy.com/oscillator_circuits_book.pdf
    • https://a540aa65-2eb1-4ac3-86d0-bf6a54daac96.filesusr.com/ugd/2d797c_196cd265ac12497eb249036c59da55b0.pdf?index=true
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_5db6ab8507bc4335a7d8462bdaca4c65.pdf?index=true
    • http://zixaxonenugoko.epizy.com/noida_metro_admit_card_2019.pdf
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_b4af406e913043cc9888289bbeb48e52.pdf?index=true
    • http://fulawumobolofog.epizy.com/bnmu_part_1_result_2019_marksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f89.bin
4118ad68628a4b4373e486ba3d89685ef201f3eac66b13870d2b4baba47e723e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F89 5356 bytes
font_01_sfnt_off000131e5.bin
a45a1de97c56b5ccd824b8cefd353f99f4e04e5a2a6d58c5a31258ca7e73fa2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131E5 11368 bytes
font_02_sfnt_off000158d1.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158D1 16164 bytes

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