Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ec169d165f0f9a…

MALICIOUS

PDF

74.6 KB Created: 2021-04-06 03:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c2f78ae325c134c1fbcb5a0642e34604 SHA-1: 7f63c731babf51955c40fc78056ff12ed9052a86 SHA-256: f3ec169d165f0f9a540c5f094ebd0d8f2f96696f0901828142d2a5df031993c2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one pointing to 'bologen.ru', suggesting a phishing or link-farming attack. The PDF structure and embedded content are consistent with attempts to disguise malicious links within seemingly benign documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=questions+about+christian+worship PDF link annotation
    • http://sivesesugipode.scienceontheweb.net/merge_with_adobe_reader.pdfIn PDF document text
    • http://favodokoleti.mypressonline.com/lafudubadefofubisoni.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/reselurobi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/savifin/rare_hereditary_blood_diseases.pdfIn PDF document text
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_e20e1a3d9830415388b0cd7226b7cd06.pdf?index=trueIn PDF document text
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_cf3fe661662846288b2ecf43e4b630c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/306b828c-2f58-4de1-b7dc-0031cfb79246/what_is_the_book_dog_man_about.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/employment_contract_form.pdfIn PDF document text
    • http://tadiwolavis.epizy.com/amartya_sen_book_development_as_freedom.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/fafowujatowomar.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_16077c96e80f4fa49d229a0e04351544.pdf?index=trueIn PDF document text
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_2f8fd2ebb81b4f9a911051e777fab92b.pdf?index=trueIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_bd1ba0a0d511489d8c8ac3ef8c351e6f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejideba/sotagifodopepuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7823490e-1d5f-48dc-95cc-da40d705b9c5/bafobimamelo.pdfIn PDF document text
    • https://e1cf253b-b3af-4135-a675-1c3c021177f9.filesusr.com/ugd/111c46_b86f3ab617e244588036fc54f20cb3f9.pdf?index=trueIn PDF document text
    • http://zetiragala.epizy.com/carcinoma_in_situ_cervical.pdfIn PDF document text
    • https://976edc35-935c-46de-9e6e-e225dbc25668.filesusr.com/ugd/0829d8_a7418feae715458d87f13a257d626e88.pdf?index=trueIn PDF document text
    • https://c20a02f1-eded-46de-afbf-2d7328e03b26.filesusr.com/ugd/c6fd25_f60ac47c47354fbdbe6d78ab1c501871.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_off0000e46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46D 5284 bytes
SHA-256: 7b735a725b8029c5071443d9de6ebda1be0d67c030e1e7f37a89336516da8d82
font_01_sfnt_off0000f66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 10964 bytes
SHA-256: eb22ec56d6b8794663549699803ef56e599725336a11da5082b26b5f6ff22d75

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