Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b68b5b3a6c8a0a…

MALICIOUS

PDF

74.3 KB Created: 2021-03-19 13:39:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0237947c0a71a7ee1aa020a04cec707e SHA-1: ed1436244b6fa764c16d5aafff653b76b8624b5e SHA-256: f5b68b5b3a6c8a0ae0259b6c920c791f9a3ccea1b72bc854432891c4cedc28cc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with at least one pointing to a domain associated with malicious activity. The document body, though heavily obfuscated, suggests it is part of a link farm designed 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
  • 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://druttle.ru/wix?keyword=into+the+woods+jr+script+pdf PDF link annotation
    • https://cdn.sqhk.co/lomasamube/ikXggge/93995659657.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467955/normal_600667cd9d98b.pdfIn PDF document text
    • https://cdn.sqhk.co/tedavevata/digN87R/46620342482.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464077/normal_5fcc8f7872693.pdfIn PDF document text
    • https://cdn.sqhk.co/dagidomu/ZidHjaa/42245545621.pdfIn PDF document text
    • http://murezisafedamaw.22web.org/badikanavefopeli.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/x3gjdgc/sandwich_shop_delphi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378834/normal_5feb7e9105461.pdfIn PDF document text
    • http://taxutipepavij.iblogger.org/28071697658.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/qdiaiaz/6455169027.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/hgjbogh/80948598433.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_0cbc16e34c464bfe99dd1dcb06d5306f.pdf?index=trueIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_6826f612b3074b8496e7ac8973224dc5.pdf?index=trueIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_43dd4b49d76e43d892180f5f36650ef1.pdf?index=trueIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_7deea54b81f14a9993fa08ab53d05a1b.pdf?index=trueIn PDF document text
    • http://guvodakar.epizy.com/11170166491.pdfIn PDF document text
    • http://boribasumagit.epizy.com/how_can_we_determine_the_end_behavior_of_a_polynomial_function.pdfIn PDF document text
    • https://56a79910-2d97-40e4-a1df-bca3b17021d7.filesusr.com/ugd/2721fc_a2a639a247d04a819aae3aaa430a66d9.pdf?index=trueIn PDF document text
    • http://kifemulawej.epizy.com/hand_to_hand_combat_strategy.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_off0000e6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F9 5104 bytes
SHA-256: 9fb2d0ed763574eaff58e1bc6b8032bb44b7272c29f8facdb28ca35ba7b39769
font_01_sfnt_off0000f870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 10552 bytes
SHA-256: 3cdd483dca19ebe5b2abb471942baf3098129962b122eab2b2aed1223c00e52a

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