Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2e74533db3dbdd…

MALICIOUS

PDF

75.6 KB Created: 2021-04-08 17:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e3fa1f6f8d198a0f608641c9de15a2a2 SHA-1: 841f4647b5d04c348dfe87c649e441172d9a676d SHA-256: 7d2e74533db3dbdd83603536b8d0212257f23b4a1e1f360e314853d15442214e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'fokemale.ru', suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the attack pattern of using link farms on disposable hosting to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://fokemale.ru/strik?utm_term=shepherd+the+flock+of+god+april+2020 PDF link annotation
    • http://imedo.ru/damning_report_traduccionna7ns.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/sivevakonuxobufegi2tz2y.pdfIn PDF document text
    • http://italy50wow.pro/filafubifoposamedeguvomopxkwyh.pdfIn PDF document text
    • https://fikejibin.weebly.com/uploads/1/3/4/3/134331262/getafovope-jimidasokerofik.pdfIn PDF document text
    • http://sefegusekepuxa.mypressonline.com/tanewowuraxelatemaxojexo.pdfIn PDF document text
    • https://givesuporej.weebly.com/uploads/1/3/5/3/135346238/3901856.pdfIn PDF document text
    • http://kutegexuwudaro.getenjoyment.net/wusimudimeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482012/normal_6029549f19ae1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501791/normal_5ff84751ac973.pdfIn PDF document text
    • http://buloshnaya.site/the_man_in_the_high_castle_trailer_deutsch5qoi0.pdfIn PDF document text
    • https://fezekisovo.weebly.com/uploads/1/3/4/6/134661064/09e0b25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463807/normal_5fe0e1f3bcdce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zopusawonomiwi.rf.gd/48802513474.pdfIn PDF document text
    • http://wozitoso.atwebpages.com/vuvuveju.pdfIn PDF document text
    • http://netawuwimirixor.onlinewebshop.net/nofuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b60f80-e338-4d3d-8e42-58a829521e64/peluxifavubujunowatixima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c2c14f-68b7-49c2-bff6-86ddc2606702/46311204431.pdfIn PDF document text
    • http://gulavofi.epizy.com/java_8u151_offline_installer.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_off0000e883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 5680 bytes
SHA-256: 1cc63585a41ea8b7e50a39614df0f268e1eef493496a5ed2f92ec0b96fb34813
font_01_sfnt_off0000fbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD8 10916 bytes
SHA-256: 63aa8fe6d6b52af4b8ff785f7989c44cb36feaea099d58f120070b359dfd046c

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