Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8d5ff4f6a6467b…

MALICIOUS

PDF

77.9 KB Created: 2021-06-19 19:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 42172611d303f2bab3034e56e326e48c SHA-1: 099a24d314785797f110552bd3925c62f63becc9 SHA-256: 7a8d5ff4f6a6467b420f1113463a39773167841dd6c7c45a38902c12a2e5f685
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript T1553.005 Security Software Tampering

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and trojan delivery attempt. It contains multiple links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document also includes instructions to disable security software, a common tactic to facilitate malware execution. The presence of embedded URLs and the overall structure strongly indicate an attempt to trick users into downloading a secondary payload, likely disguised as a software installer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://plswa.com/wp-content/plugins/super-forms/uploads/php/files/4b93b2d62767d20a748d90bcf2502f08/negadefivevezilonaketoxav.pdf In PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/00c000d9357631321e6188f267e38a21/wiguxunubiwojodisutunuva.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609f305ddc704---46453871490.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7544b5fc3---51839409246.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/3b53dd51c7c62ff0fe40abc57857690a/kinekeraxuf.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f12f92223d---vixudepukeza.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/92ffmauku1tl5409dgik73h7r5/jabutuduxamiliga.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/dqmej5cojl50n5gop4s36a4esa/wuxutepilisutaronuxisafon.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609121fab8542---14426325693.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/uus6r8fdl5aopggotm2r2g1mb7/38469488301.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/tkb0hskc68k8krkiq471led9tt/pixebodes.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade4a3d6293---fulivoramisevanuvifedi.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/77427730254.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0a5a18177---wetolisuv.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/lasabemadofu.pdfIn PDF document text
    • https://congchung7.com/upload/file/divumafamowelo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=stronghold+3+download+utorrentPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF065 5268 bytes
SHA-256: 5aded6ad6e880b34189512d221a01026bfb0c513e1093f2bd66813fc4d939182
font_01_sfnt_off00010259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10259 12688 bytes
SHA-256: a9abe446f5c133e42824d81efcc1213e1e7e25c364b23118c553b47501450501

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