Malicious PDF — malware analysis report

Static analysis result for SHA-256 0780d7752310d158…

MALICIOUS

PDF

80.6 KB Created: 2021-09-11 12:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a93c83fa9bdcaa036d34f5c6d0c3d1b7 SHA-1: fc21ff8c277de0dbb6d782bb79a2ece1bb9a2d35 SHA-256: 0780d7752310d15832ceb462e42dc336c1449f02e11fb811f00143a36986908d
174 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and is flagged by ClamAV as Pdf.Phishing.Trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier output of 0.991076 further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://balajitutorial.com/admin/userfiles/file/85646119733.pdf In PDF document text
    • http://lrm.mcdonalds.ua/ckfinder/userfiles/files/61275511555.pdfIn PDF document text
    • https://majubesar.net/contents/files/ratodebapowodekitanuriwal.pdfIn PDF document text
    • https://kakakmanis.com/contents/files/sinovenamilikotepaxoxuwu.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/jevudogataviwivijofa.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/desajo.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/70008944885.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/velexuwilur.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/kafilagimejip.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/filotifowoguk.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/59865757724.pdfIn PDF document text
    • http://jungam21.com/upfiles/file/1631088684.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130365708fd8.pdfIn PDF document text
    • http://transportdiverse.com/uploads/files/85400568181.pdfIn PDF document text
    • http://flexa.cz/docs/file/wuxufejowewuworixipam.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/kodilage.pdfIn PDF document text
    • http://scandinavia-ex.com/images/blog/file/mosomefinetodemirunun.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/27565326566.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/55669449110.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/42125567327.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/sofoxidukuvawepexenowifuw.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/20953951511.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613afb1b413e0---muloxosonebixakezezafig.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/vikatogewixamed.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/46730236009.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/65572926393.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/70485970877.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=nokia+e71+android+osPDF 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83F 17284 bytes
SHA-256: b4c0257c594cbb02b407fb0ea366a3a3b61c17e851ca02eea5b0950a4ac0cbfb
font_01_sfnt_off00010538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10538 10268 bytes
SHA-256: 1be395d6d2fba51d79d78ae6741346c7d62389a7486f4192cce12b5361e7f427
font_02_sfnt_off00011c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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