Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e591f22e268c15f…

MALICIOUS

PDF

81.9 KB Created: 2021-06-20 13:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1daf035961e4af033733d562ba95faa7 SHA-1: 313b82e72e18ff072f074517a30d481d6df98039 SHA-256: 2e591f22e268c15f64f5838b0a94d35306e232a3f2fa945a5fc7286f856773ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely contains malicious content. The heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress sites and disposable hosting domains. The embedded URLs suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dallaslandscapedesign.com/media/files/47399316199.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160814e731820d---26430321005.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ae59ca8b3---49688731023.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607848c5895c5---dazeb.pdf
    • http://jnnycc.org/userfiles/file/34336124263.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b40e516dc7a---bosodefaw.pdf
    • http://paillasse.hu/userfiles/file/39665624326.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b59a84b172---walemupowapidub.pdf
    • http://bronia.org/userfiles/file/gotazivivepadikup.pdf
    • http://luluscafeonline.com/uploads/files/54989715908.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607adad5469d4---wurilekunumoxikulupesu.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/9debe07d1e1bd6ce0a6f2b50a8a9123b/20709429167.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/1fee3385b3aca64cc203aa0c28d71364/jaripu.pdf
    • http://learningkey.org/userfiles/zuxibivegebapetu.pdf
    • http://navigator-33.ru/media/file/26943732719.pdf
    • http://lsbwg.com/ckfinder/userfiles/files/20210613/1034341497.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/d721a13180cd4e4c5572bc987ad9aafb/jeridevupamopobagene.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/adf17f13078552f0dfa737f0adff8914/sapumajixo.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/a158a5e99bc04e8552c7252b28a47317/jugipalafipodorulaniwopov.pdf
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=actress+devipriya+hot
    • 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/
    • https://gitlab.com/smc/meera/blob/master/COPYING
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010120.bin
8238dccf5f9dc0ffe9f557415fcbbacbe9479c1e635dc3b4023f9d1cc5daa786
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10120 4800 bytes
font_00_sfnt_off0000ef2e.bin
27c097b227c6b14cb18391f363f18c0b55fe5d8a1be414edb3010e8b0c49851d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2E 5280 bytes
font_02_sfnt_off000112e9.bin
d475871f31b984dfa7cea9264a7043825b1d1c01935fb4478d21d0df7b5c0573
pdf-font-stream PDF embedded font (sfnt) at offset 0x112E9 12172 bytes