Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5b4c47f0780644…

MALICIOUS

PDF

79.1 KB Created: 2021-03-27 19:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb21cafa6d4b94de088233b69e71346f SHA-1: 19627303187b2750f0dd01c157b64441f6866cd0 SHA-256: 4e5b4c47f07806445e13297b101f8fe1e050241346fe086a9c7a7bb28b5f9412
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a "PDF link farm", with one prominent URL being `https://lozipotod.ru/123?utm_term=magic+8+ball+yes+answers`. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=magic+8+ball+yes+answers
    • https://cdn.sqhk.co/tevosenijosu/jeGxgyK/57640442587.pdf
    • https://cdn.sqhk.co/toriwogadej/fhhjegd/75710247928.pdf
    • https://cdn.sqhk.co/pimidima/dGviiog/67356329881.pdf
    • https://cdn.sqhk.co/nopusixinid/52jgigy/azo_dye_formed.pdf
    • https://cdn.sqhk.co/jigavozef/bHisAha/fagefunogarenarexegam.pdf
    • https://cdn.sqhk.co/wibezudak/FhfTkO1/cargo_pilot_salary_california.pdf
    • https://cdn.sqhk.co/kososojog/cb02Jgh/geometry_assessment_book_answers_chapter_11.pdf
    • http://wuvudazesog.22web.org/free_online_english_grammar_book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://151dec52-cf20-477b-a401-a68195eead79.filesusr.com/ugd/8538f4_42015d1116ab4646a4d5544ff96675e1.pdf?index=true
    • http://mewexam.epizy.com/ansys_19_license_file.pdf
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_dc094dffe75d4d469756f315ce6c5398.pdf?index=true
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_b6db2f4573be4d788d5542fb9cbdfdcd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b4d75fea-4dd2-4edb-967d-2b3074bdda08/76706086336.pdf
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_6b13e66d8f344069a1411e29a2da30bd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ebefb350-39ae-4ddd-92ec-191069560652/wokowi.pdf
    • http://xonumubik.rf.gd/java_ee_tutorial_for_beginners.pdf
    • http://rudutotisexanib.rf.gd/4x6_shipping_label_template_word.pdf
    • https://uploads.strikinglycdn.com/files/a6df4535-2f21-4d30-9d79-34e172616a06/how_to_install_brother_printer_hl-l2360dw.pdf
    • https://uploads.strikinglycdn.com/files/910f379e-32ae-49b6-988d-3a11d54dfd6c/xamilimuvovobun.pdf
    • https://uploads.strikinglycdn.com/files/960d136a-e4ac-43d3-a5a7-449a97107707/arnold_ehret_il_sistema_di_guarigione_della_dieta_senza_muco.pdf
    • https://uploads.strikinglycdn.com/files/ebfb8096-249d-4dd4-8f8b-9b4f2ab21002/bmw_e90_service_reset.pdf
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_490b5611d9354d258b48c2cc9cfd6263.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b1819e62-0e33-4f90-b6b6-78c95b928ec1/kumizasifevelolutabex.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_off0000e07f.bin
d37c7fb99c43ca511944e19268546334ba59e79c3045d3a827827270e2abd022		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE07F 5500 bytes
font_01_sfnt_off0000f366.bin
385f6270aa135837de5a2072a64339e79e14975c696db4e7b2f774913a0e67d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 11156 bytes
font_02_sfnt_off000119f2.bin
513236b56cd24d18f1916a542380e1656fe596eca6e14df5516133ff488da9f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119F2 16100 bytes

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