Malicious PDF — malware analysis report

Static analysis result for SHA-256 02eb45246b89ccde…

MALICIOUS

PDF

75.8 KB Created: 2021-02-21 00:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9a46f4004f0339968a97c542b852e7b9 SHA-1: 2ecde0e6179605649c61df4955866ba6ff05b07a SHA-256: 02eb45246b89ccde8d81234f954052534a527ea76db07e2cae5565dd80691acb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or a scam. The embedded URLs, such as http://fruit-ital.space/bullhorn_api_guidex8n2k.pdf, are indicative of a payload delivery or redirection mechanism.

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://jacksth.ru/123?utm_term=which+phones+have+wireless+charging+capabilities PDF link annotation
    • http://fruit-ital.space/bullhorn_api_guidex8n2k.pdfIn PDF document text
    • https://giruwaferelesed.weebly.com/uploads/1/3/4/8/134850821/7305262.pdfIn PDF document text
    • https://dexanefuv.weebly.com/uploads/1/3/1/3/131383512/7b756e0d4b75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481510/normal_60297ecd3cb3b.pdfIn PDF document text
    • https://zisovubuzuteb.weebly.com/uploads/1/3/6/0/136086112/93e4a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480173/normal_6004edb149684.pdfIn PDF document text
    • http://lesantyqas.online/what_is_the_purpose_of_experimentation_in_a_research_study8rbv7.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/oGjaifk/90246421722.pdfIn PDF document text
    • https://cdn.sqhk.co/romekeka/jiehiq7/xuladazozu.pdfIn PDF document text
    • https://zeruposizagaki.weebly.com/uploads/1/3/4/8/134854722/4859547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456999/normal_601548201f6a1.pdfIn PDF document text
    • http://bristol-yalta.run/4476070572cwzj3.pdfIn PDF document text
    • http://winoraama.fun/a_christmas_memory_truman_capote_themegyel0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/oppo_a37_ios_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/arabic_vocabulary_in_english.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_off0000eabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABF 5500 bytes
SHA-256: e844ef6cd62077ef8494c36f0672dffee3edd4d800dc1f051c91b3e8b572bfce
font_01_sfnt_off0000fd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 10688 bytes
SHA-256: 0bdc5b7703d5b785bd064f9afbcbe3414899c98384dd09dcb8eb42bcbf355441

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