Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ba95fab6311c66…

MALICIOUS

PDF

73.6 KB Created: 2021-03-15 01:33:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bd4e911000e0307f073f14469d18945 SHA-1: d26605de0694db9bf9c63953b5e59e2114ffa40d SHA-256: 30ba95fab6311c661be3e34b2a05c0389e1aa3da76fbc160561617f8cafb7a3d
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs likely lead to further malicious content or phishing pages, aiming to trick users into downloading unwanted software or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/wix?keyword=nfs+hot+pursuit+apk+uptodown
    • https://vawevoza.weebly.com/uploads/1/3/1/4/131482963/tijem.pdf
    • https://potepivogatofef.weebly.com/uploads/1/3/2/7/132740463/50eccd94053f2bc.pdf
    • http://zinetaloju.iblogger.org/super_auto_typer_5._0_free.pdf
    • http://pogexuxujun.22web.org/76869137199.pdf
    • http://worelimupuvefam.mywebcommunity.org/29255679098.pdf
    • https://cdn-cms.f-static.net/uploads/4492555/normal_60472f2704ac8.pdf
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/e366946.pdf
    • http://fakurivevid.scienceontheweb.net/best_advanced_excel_course_online.pdf
    • https://cdn-cms.f-static.net/uploads/4410433/normal_603364b1e7220.pdf
    • http://gixapedotamerow.mywebcommunity.org/judavejiwofunovexikubato.pdf
    • http://vomenelavive.22web.org/seteresafimofolixibes.pdf
    • https://cdn-cms.f-static.net/uploads/4369153/normal_6025ebd499381.pdf
    • https://cdn-cms.f-static.net/uploads/4448124/normal_5fd0ac0e3de2e.pdf
    • http://gubixazolela.sportsontheweb.net/ravewitiwetobevuvor.pdf
    • http://mitisavad.getenjoyment.net/how_to_renew_red_cross_lifeguard_certification.pdf
    • http://bometaximom.scienceontheweb.net/nezuzuwawesow.pdf
    • http://nakalabaxis.mywebcommunity.org/bifironojebovepupomigal.pdf
    • http://pifedalune.medianewsonline.com/how_to_fix_jammed_nerf_gun.pdf
    • http://rubewox.sportsontheweb.net/macbeth_act_2_scene_3_translation_to_modern_english.pdf
    • https://static.s123-cdn-static.com/uploads/4505820/normal_5feb812a3c7a1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kalogoraretupo.epizy.com/cell_structure_and_function_part_2_answers.pdf
    • http://mugukogegib.epizy.com/67008409395.pdf
    • http://seredinuvamegu.rf.gd/python_graphical_user_interface.pdf
    • http://setowejow.epizy.com/sixenonepowora.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d63c.bin
93b26e7c5b16db27c67ae3a939751af7c59f625f66abdb2c4950954db5395772		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD63C 5220 bytes
font_01_sfnt_off0000e813.bin
4478c1931fc7a1903d14d5d33d8781eb8318396f09658da1ddb16128f8bcdb5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE813 15192 bytes

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