Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7e54901072df48…

MALICIOUS

PDF

82.0 KB Created: 2021-03-30 10:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ae5ff061f92e9baadb27ada0d52a17a1 SHA-1: b17405db75b3572943ae27f24003e46e532bfff8 SHA-256: 0f7e54901072df48af92aab3e0b0a1fa9bff7f7d8cfcfdebaca7e34e9b17b8e3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, potentially using JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://jumiwimov.ru/award?keyword=class+11+biology+book+in+bengali+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455660/normal_60550ddb8bee9.pdfIn PDF document text
    • http://tonalemeketav.66ghz.com/fitbit_ionic_adidas_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/Lvldhg6/this_means_war_full_movie_stream.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377674/normal_5fc7752b3cd7d.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/gigdn3P/28659966143.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/Mjhjhjj/75137252205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_601ee25d259fe.pdfIn PDF document text
    • http://mojikinewosak.22web.org/92616224609.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489240/normal_5ffe7a7655b72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386593/normal_60067e8881c9a.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/rPqoibg/59090108027.pdfIn PDF document text
    • https://cdn.sqhk.co/tifatuju/gjJjeje/grocery_shopping_list_app_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vodupuginotipir.rf.gd/fargo_hdp5000_error_code_283.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/what_is_the_exposition_of_a_plot_in_a_short_story.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/tujininogotogog.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/chargesheet_movie_cast.pdfIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_4db68740808f47f79686a4bffffaf763.pdf?index=trueIn PDF document text
    • http://webataj.epizy.com/98390773807.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/ravi_name_ringtone_song.pdfIn PDF document text
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_5bb519193f0841aca7f189ccc33145c8.pdf?index=trueIn PDF document text
    • https://4a31e3f8-49e3-4331-b1a9-c0bb7a6b9dbc.filesusr.com/ugd/599f1c_6e73a0bc40a64c2a83fe29a19d141379.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/78032130140.pdfIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_de3e0863316b4d25b2eae4032e126fa6.pdf?index=trueIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_fc545eccccef4a2b80d6c030f4a5a53e.pdf?index=trueIn PDF document text
    • http://kifixawoxo.epizy.com/42898640146.pdfIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_3d8e4fa3bb12457b9514c16bfaaa48b6.pdf?index=trueIn PDF document text
    • https://804b95bc-9ca4-448d-a094-5a8e1ff69a26.filesusr.com/ugd/99d1da_af6e62675939402b98eec4dd405f737c.pdf?index=trueIn PDF document text
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_829872835ecc4d00a88432e2438f177d.pdf?index=trueIn 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_off0000ff06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF06 5468 bytes
SHA-256: fc47c0b164d666a8d6aa04c1e5e2b5731f915181953af8cc9976191bd55f24ee
font_01_sfnt_off000111d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D2 11176 bytes
SHA-256: 940193f44dad10f4fe2bf5d596350d9920539f4e4e4d25b685b6edaf61ccf512

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