Malicious PDF — malware analysis report

Static analysis result for SHA-256 60388e45deccdc78…

MALICIOUS

PDF

80.1 KB Created: 2021-02-25 19:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 152bfb9d09aa57ed117e7f2b2da8e8ee SHA-1: b7e465c02d19af718fd100ea6ee61592db6d78aa SHA-256: 60388e45deccdc78effb7d97f02bedf9fbeb9e3a0cef1161a566ba44e3658970
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical alert for malicious redirector links and ML classification indicating high maliciousness. The document body is heavily obfuscated, but the presence of numerous links to disposable domains suggests a phishing or malware distribution campaign. The primary attack pattern involves leveraging these links to redirect users to potentially harmful content.

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
  • 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=rhythm+exercises+pdf In PDF document text
    • http://urologo.store/how_long_to_cook_a_10_pound_turkey_in_the_big_easy0suxx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456128/normal_601226f651edd.pdfIn PDF document text
    • http://sosunimepewe.22web.org/background_blue_photo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503584/normal_5fd87f82ad12e.pdfIn PDF document text
    • http://doordash.link/how_to_test_headphone_mic_androidrlgnv.pdfIn PDF document text
    • http://bandalet.club/jagifjw8jt.pdfIn PDF document text
    • https://bevozuvegala.weebly.com/uploads/1/3/3/9/133999301/wamukuduxep-kopujirowavir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370744/normal_60068f9476579.pdfIn PDF document text
    • http://domavera.ru/24177189781thfnh.pdfIn PDF document text
    • http://guwilos.iblogger.org/explain_latter_and_former.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://renoxefi.epizy.com/wuvezolidatojokar.pdfIn PDF document text
    • http://lelirovosas.epizy.com/lerarufamizibimenetire.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/how_to_replace_pressure_cooker_sealing_ring.pdfIn PDF document text
    • http://tinipolevuzow.epizy.com/kali_linux_wifi_hack_free.pdfIn PDF document text
    • http://webukoxaxox.rf.gd/sejawa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF83 4904 bytes
SHA-256: 71ae36bc4e1ef4171b5542e39822322002bde26d559658b00aa148d49138b155
font_01_sfnt_off00010043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10043 10948 bytes
SHA-256: d12e1aa63ffadfdabbc774cb2022b263d59cd58fff989fc4a3944cdde29a1e3b
font_02_sfnt_off00012584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12584 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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