Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8bed4e7fe042d5e…

MALICIOUS

PDF

88.2 KB Created: 2021-02-15 10:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2299ac56f3e3182a0b78fb16c17d60e0 SHA-1: 4e6f0e9541e6c66e73c67816c68f48b4a967c550 SHA-256: e8bed4e7fe042d5e439739fe8050ac4d4b2b70e3e0ab6fa4310ae92a203b68b8
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on 'https://jottigo.ru/strik?utm_term=ethical+hacker+salary+in+us'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file.

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://jottigo.ru/strik?utm_term=ethical+hacker+salary+in+us PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426541/normal_602199791893d.pdfIn PDF document text
    • http://rerubin.space/392043892041txqn.pdfIn PDF document text
    • http://eeuuurrrrr.space/jikidulinusumma08.pdfIn PDF document text
    • http://triple-doska3.club/xawagozagixulivit3hnv.pdfIn PDF document text
    • http://geleostone.online/nenokidaxapozetemupbx3jo.pdfIn PDF document text
    • http://zuvels.xyz/fall_guys_ultimate_knockout_crack_download_freedkchg.pdfIn PDF document text
    • http://badgesverified.com/antd_datepicker_formatb3bqc.pdfIn PDF document text
    • http://7lessons.fun/reporter_kidnapped_by_isisp6x7k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475729/normal_5fe3a4e0375a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450156/normal_5fea06126afdc.pdfIn PDF document text
    • http://wacc-cat.org/rosugifefulutajazedinv3n1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393022/normal_5fcc53b7403e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461483/normal_6018ddd9715c3.pdfIn PDF document text
    • http://gomijojupi.iblogger.org/lagu_anggur_merah_2_karaoke.pdfIn PDF document text
    • http://you-bestshop.xyz/destination_b1_downloadcn5w4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suvowafavij.epizy.com/11111927328.pdfIn PDF document text
    • http://seboraka.epizy.com/kurutepobuxiw.pdfIn PDF document text
    • http://jupelujunu.epizy.com/cabal_mobile_apk_mod.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_off00011c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5A 5012 bytes
SHA-256: 1f6f3306c7bd454dc31a409ab41d7354f6fedb74878a946c25f3d81cc55f71c1
font_01_sfnt_off00012d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6B 11176 bytes
SHA-256: d9f956125343f2a18232ab827679ba87ae1f4d926eb1b5b7c2b63de215f970e0

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