Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6e9f66e8d84f14…

MALICIOUS

PDF

79.9 KB Created: 2021-09-21 07:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fc3525b43483c9da5ea61e7b497704f1 SHA-1: 6959f66f8a71135bc11fa497b76e0f1aa32105ab SHA-256: ee6e9f66e8d84f141a900cf5aac4e3b620c0dd69e481df74782939a7749943c5
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a large number of embedded URLs, many of which point to disposable hosting, suggesting a link farm or phishing lure. The presence of a QR code lure further supports the phishing attack pattern. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://huntic.ru/uplcv?utm_term=android+apps+phone+book PDF link annotation
    • http://jlm-kg.com/uploads/file/vatifeminagaxodo.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/vemosaxufi.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/0e1f53d05a87b4a0bccc8f62e89fbc70/59681633278.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/96344740283.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/bimudufuwusoparoxu.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210912204651.pdfIn PDF document text
    • https://breedlife.com/upload/files/neveguniwalane.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/vilutiruxev.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/3601441246.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/jisobafa.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/rafilewefuziziforiweri.pdfIn PDF document text
    • http://sakem.org/userfiles/files/31815388401.pdfIn PDF document text
    • https://fishuntpesca.it/file/1963726691.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/fekafif.pdfIn PDF document text
    • http://mtegl.wsystem.sk/userfiles/files/wimaviduzogum.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/jiporaxon.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/fidozaxidin.pdfIn PDF document text
    • http://gzbaosui.com/uploadfile/files/zuwerazudubimobidelekalix.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/sanude.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/wabirezonibasuvives.pdfIn PDF document text
    • http://fohow77.ru/upload/file/pimogosadanejokoregileda.pdfIn PDF document text
    • http://18554080.com/userfiles/file/jamotanudolovup.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210915_150120.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/36841848767.pdfIn PDF document text
    • https://rivieresoceanie.com/userfiles/file/zivuxu.pdfIn PDF document text
    • http://full814.com/upload/files/rogixodi.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EB 17560 bytes
SHA-256: 46c09286b39d25095218497308ceb07695dc2b0d87509b5a8f6882cff91ac06f
font_01_sfnt_off0001022f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A46 10556 bytes
SHA-256: 4f47e9be81d02a7e0ca8b67eca79bf39ce90134a97b788246a0c67ca62856a65