Malicious PDF — malware analysis report

Static analysis result for SHA-256 6250d8b9bdc84e90…

MALICIOUS

PDF

81.7 KB Created: 2021-09-11 09:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b09758569835f312c644a1ac1955fd1d SHA-1: 0788f2ae7dc9c16ee3c31d66db4ff2e4dfb85ab0 SHA-256: 6250d8b9bdc84e9040703f52493560b533f3f2386a16d902a8755aa84263c9ae
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to potentially compromised websites, and is flagged by ML classifiers as malicious. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's content likely attempts to solicit sensitive recovery secrets or private keys from the user. While no scripts were extracted, the overall structure and heuristics suggest a phishing or credential harvesting attempt, possibly delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • 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 http://artpolinakuzina.ru/pict/file/56503507140.pdf In PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/a99003976c07d7f86eca3b841377d396/kuzubazonogifo.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/30664208457.pdfIn PDF document text
    • http://woodlander.sk/grafika/file/muwasomemopazome.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/nemixoga.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55636336291.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612feba0c8824---gipufapiwofegexesaruv.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/bedizikolegifuxak.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210901125042272.pdfIn PDF document text
    • http://pooq-design.com/app/webroot/fckfiles/file/60779662889.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/befedovapariwewudi.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/buvuwawad.pdfIn PDF document text
    • http://neteyes.eu/editor_up/fevudirodizadorutuwov.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/68615565146.pdfIn PDF document text
    • http://proficlim.ru/public/userfiles/file/64780685907.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/70830175057.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/61283551113.pdfIn PDF document text
    • http://ergakiland.ru/files/files/98798542620.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/wenimubazufetijit.pdfIn PDF document text
    • http://clickvay.com/upload/files/98832792688.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/f9bab101f4e2f5b6d6cd072870f35110/somokabokob.pdfIn PDF document text
    • http://fteq.ru/files/file/wofopaxod.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/xikebomigavisabanerituvel.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/nudetogexupolupekijanu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=most+secure+keyboard+for+androidPDF 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_off0000d8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D3 10864 bytes
SHA-256: 142ae9e99d54339b95123a6179858cccec4b7577626bf89202ff4d6a818be7a2
font_01_sfnt_off0000f226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF226 18284 bytes
SHA-256: 038197b27845f0f7de002be1dd0b8a0a4be1ef6b82334fac2b102c9b625e7039
font_02_sfnt_off00012161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12161 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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