Malicious PDF — malware analysis report

Static analysis result for SHA-256 3372c8af696edc2e…

MALICIOUS

PDF

73.4 KB Created: 2021-03-16 13:12:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 72322100b3de2f1ff48c2dda371ad0fd SHA-1: 26707de14aba0781b6a01632df1823e209069127 SHA-256: 3372c8af696edc2eb69c0d58f4e889cb89a6792ce2736951b8f8ce43f4dbaa6f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the overall structure strongly suggest this document is intended to redirect users to potentially harmful websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/wix?keyword=manifest+destiny+painting+analysis+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367303/normal_5fca7aa501af2.pdfIn PDF document text
    • http://dexowowijovovu.iblogger.org/jaipur_trip_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445877/normal_5fdfaaca2ab54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500667/normal_5fe428e4af41a.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/jutedozubutavakabi.pdfIn PDF document text
    • http://nimened.66ghz.com/cae_exam_report_example.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527859/normal_604acbb869177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475866/normal_5fd774110ae1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_81576001e1384a228c132871df11236d.pdf?index=trueIn PDF document text
    • http://ravesezubepad.epizy.com/jumod.pdfIn PDF document text
    • https://aaca6425-83b8-4992-a49d-2ec8a2d61848.filesusr.com/ugd/304e3c_95a064862c5a4a5ba8872d009d2b4f59.pdf?index=trueIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_5a91fa1e63cb4a6c9867e8b4fc325509.pdf?index=trueIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_3e61d1a82aec426d8b644e421956aa0f.pdf?index=trueIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/11176379277.pdfIn PDF document text
    • https://dcd602ed-50e1-465b-8d27-562d8cedec17.filesusr.com/ugd/9c43ec_5b105b17c810488089d83e9b6ed82694.pdf?index=trueIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_0ac9e7a27b10496c9d0dd3c0eca195f7.pdf?index=trueIn PDF document text
    • http://liviwofuxa.epizy.com/garofevovagawegoj.pdfIn PDF document text
    • http://sisawujeza.rf.gd/codingbat_recursion_1_answers_array6.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_off0000e001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE001 5568 bytes
SHA-256: 3f869bdaf9edf016970e8d8c4e9a1af1848c9c9542417d1aba2c40251a5c3364
font_01_sfnt_off0000f312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF312 10868 bytes
SHA-256: a02ac6d94b1b9e35e5469b54d9d50874526311ce07ecbf99e82ca63e3713d3b5

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