Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c22dfbedab37d8f…

MALICIOUS

PDF

75.7 KB Created: 2021-03-28 00:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a2c4d71bfa0e28ee21516189dd70e6b SHA-1: 5907dd7b41cb7835eb3bdb13bece3a0c6d28f177 SHA-256: 8c22dfbedab37d8f5f539064e463a1afbf2b3b05e34070b6d591e4b003735be9
156 Risk Score

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 phishing or trojan threat. It contains a large number of external links, with one prominent URL pointing to a keyword-based search result page. The PDF's content appears to be a deceptive lure related to real estate, likely intended to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=beaver+houses+for+sale
    • https://cdn.sqhk.co/nezafomura/CgiZ3CS/guvokobozimudigobebudigeb.pdf
    • https://cdn.sqhk.co/zadorari/GihVggE/jafemi.pdf
    • http://pexulisinipev.sportsontheweb.net/how_to_repair_deltran_battery_tender.pdf
    • http://mimivamefigupe.sportsontheweb.net/simple_website_development_agreement.pdf
    • https://cdn.sqhk.co/fenazijeguk/cdhghh6/bridge_hd_wallpaper_for_pc.pdf
    • https://cdn.sqhk.co/buxoxurobewi/r7hiJ94/7583854291.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nepupiborama.rf.gd/11231205110.pdf
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_cbefec1b7f224c59b8079b0d418681a5.pdf?index=true
    • http://rawatakutuju.rf.gd/canon_scanner_lide_300.pdf
    • http://jimomurapujivo.onlinewebshop.net/rasajenisaretokuwuvibe.pdf
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_a571550d4bb84897afd031f4c10112bf.pdf?index=true
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_c4657efaf5414113917e03bcc855b75e.pdf?index=true
    • http://zitabodubelaru.epizy.com/vector_brochure_design.pdf
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_7939aceca5714ac695a03e587915e39e.pdf?index=true
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_efea4638de0a488ea86c2be35cd4d54b.pdf?index=true
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_77416167fb644bdea2c34821b74ffc91.pdf?index=true
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_f1bca35f8e7c4543a5f47a37171e6573.pdf?index=true
    • http://vijunipajo.epizy.com/64697587866.pdf
    • http://busajolixaba.epizy.com/where_to_find_network_security_key_on_arris_router.pdf
    • https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_c3aa0782662c46e7975c4ae032d370e8.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae3.bin
fd3bea464e4b526ba8543b334791966a879f4cfc717bfcb8721583926b6a1cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE3 4964 bytes
font_01_sfnt_off0000fbca.bin
e6b2636009c724f94af2d7a9152bc45e56ce157e0c7832f7103ea8257cfcfc74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCA 11096 bytes

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