Malicious PDF — malware analysis report

Static analysis result for SHA-256 f598edea348b5c4a…

MALICIOUS

PDF

76.5 KB Created: 2021-03-27 18:37:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: eb71444d0e8bc83c701b41f56ab64a73 SHA-1: f7e0be7561abf4075d99eecc634de1dacade62a8 SHA-256: f598edea348b5c4a0082f334f816a23f698a2575bcfe6c1240241627ae2a8f11
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to downloading content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=descargar+el+diario+de+greg+4+pelicula In PDF document text
    • http://nnorm-id.com/1623048195170pxl.pdfIn PDF document text
    • http://xteenware.online/autonomic_nervous_system_pharmacology_questions_and_answers7fyni.pdfIn PDF document text
    • http://cupe1.ru/fronius_ig_plus_a_10.0-1_unizw8hx.pdfIn PDF document text
    • http://maykistore.ru/badepobosimy4qa9.pdfIn PDF document text
    • http://profaudit32.ru/58500831472iakye.pdfIn PDF document text
    • https://jesetopag.weebly.com/uploads/1/3/4/6/134632795/xawujerarekexo_zudolazeguxesul_jojuxotukife_fumuzevabux.pdfIn PDF document text
    • http://foodguideblog.com/mah_march_cet_question_papers_with_answers255rr.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/automatic_car_parking_system_using_microcontrollerqf69l.pdfIn PDF document text
    • https://mirivibi.weebly.com/uploads/1/3/4/2/134234555/9380434.pdfIn PDF document text
    • https://luketekovagitor.weebly.com/uploads/1/3/4/2/134236109/suvagofopusani-nabowutexir-rudil.pdfIn PDF document text
    • https://xalorato.weebly.com/uploads/1/3/4/3/134317389/gawitege-kusivetatew-fubozuzu.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/zumezeviwakiz/81587267126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d7510bf-d7e6-4687-b3eb-46b5313f0336/gofizenezisukapovuz.pdfIn PDF document text
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_98301d737dc24ef28b98575887e9101b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bed625c-ac29-4e8e-975c-941480965119/gutilug.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/hearthstone_dalaran_heist_chapter_1_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c162e2-271f-4d15-bf32-447a4494f913/dexolixetodonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9079964-4416-475d-91bc-3c91ad654f1a/gefelobexutuxemu.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/17171171238.pdfIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_4ff9c35b4d9c4ecc89b4bb02032de960.pdf?index=trueIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_20ea34a5c92941a199266d09d765b2de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/47705775703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a892da-52a1-4f10-b995-76eacb3baccb/11712433365.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/use_of_the_apostrophe_for_possession_worksheets.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64C 5328 bytes
SHA-256: e1c709e02845b1ed3bf9df0c4009b31816989fcaea2d621ec941082ea7c17747
font_01_sfnt_off0000e884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE884 11100 bytes
SHA-256: 0ade8d9af430c1378f01b3ea50ff1b57f0af911e81ebb10153fead682370f152
font_02_sfnt_off00010d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2F 16116 bytes
SHA-256: 3dae81b76154e7c62b3b0d30507344c78f02ee9172d09a03fe7a9af96af9e849

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