Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24bf1f43d0c6238…

MALICIOUS

PDF

68.5 KB Created: 2021-03-12 08:58:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d434220c79fbcb6a84aa18964dc40168 SHA-1: cb891e2d541e9301027d32893179e72d805e5395 SHA-256: d24bf1f43d0c6238c16ec970ea3e568e5aa1b190326ffc0fa28c6d0f32bf4a8d
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 hosting and configured as link farms, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/123?utm_term=holding+hands+images+free PDF link annotation
    • https://lixevipilevorox.weebly.com/uploads/1/3/4/6/134634278/70f03382.pdfIn PDF document text
    • http://xulikugo.iblogger.org/wijakuropedetidefokixe.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/62405372208.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/twilight_saga_breaking_dawn_part_2_soundtrack_download_for_mobile.pdfIn PDF document text
    • http://pemojubeku.iblogger.org/intra_aortic_balloon_pressure_waveforms.pdfIn PDF document text
    • https://cdn.sqhk.co/togodawexu/3NboNeV/4456790397.pdfIn PDF document text
    • https://zefisazivite.weebly.com/uploads/1/3/5/3/135314851/4c76ec6b9bea3.pdfIn PDF document text
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/5849040.pdfIn PDF document text
    • http://kelimap.mywebcommunity.org/what_are_some_personal_aspirations.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/ybhhMhh/refuloz.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/70913726696.pdfIn PDF document text
    • http://piwifeg.22web.org/asme_b16_5_flange_dimensions.pdfIn PDF document text
    • https://cdn.sqhk.co/dejojoduzi/jijb6jc/40394527562.pdfIn PDF document text
    • http://pumorux.medianewsonline.com/spider_man_comics_free.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/stairway_to_heaven_solo_tab.pdfIn PDF document text
    • http://pupesotiv.22web.org/48779829647.pdfIn PDF document text
    • https://tutusilubejisev.weebly.com/uploads/1/3/4/5/134599447/sokajijolito_popazutazoluk.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/56443163732.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/important_vocabulary_english_to_bangla.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/17543226810.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_02e7688c1e944e2faed17da868fdb01c.pdf?index=trueIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_061a470bed3a4b57a2fe4048a66652f1.pdf?index=trueIn PDF document text
    • http://tawexega.epizy.com/articles_of_organization_template_virginia.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_off0000cf5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5F 5280 bytes
SHA-256: c5191391482e91fefbb94de51f7ad7178a1a6ed2855c20a349df42f11d5a966a
font_01_sfnt_off0000e124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE124 10680 bytes
SHA-256: 284eb15a32a997e08cb52468b36f27478f4868adf7c0f05c95b558e93eee22e4

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