Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f6766cd5138b5f…

MALICIOUS

PDF

77.8 KB Created: 2021-09-27 21:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 99b2d2c5fcbe4131f243276ac3410ab6 SHA-1: 0202b3c49ede92e2db46cde1247fcd85a41d1fa8 SHA-256: 01f6766cd5138b5f8bb8a307da06286184ac37a453ea043678553e196fccab4a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of many external URIs points towards an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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.
  • 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://szabobuszberles.hu/files/files/28233305983.pdf In PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/54920600741.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/48989005124.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a85e29742e---80887958232.pdfIn PDF document text
    • http://luxlustry.ru/img/upload/dokezi.pdfIn PDF document text
    • http://tivati.com/uploads/userfiles/file/33264764537.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/35898593851.pdfIn PDF document text
    • http://ordineveterinarireggioemilia.it/userfiles/files/33768316537.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/15751627818.pdfIn PDF document text
    • https://sinaia-vik.com/admin/fckeditor/editor/filemanager/connectors/php/file/19119853241.pdfIn PDF document text
    • http://pelejas.com/IMAGENS/CKFINDER/files/sobefejapadunagexebate.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/noletudomapobiviki.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/93291388905.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/61855334679.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/gamupabisesenepuwudup.pdfIn PDF document text
    • https://pacientes.quiroser.com/UserFilesQUI/file/31013638058.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/ruxelewixidosabivasusos.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/sepegepofosabef.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/202196120518442.pdfIn PDF document text
    • http://guowangcable.com/d/files/lipekopuvurepot.pdfIn PDF document text
    • https://harley.dataroom.tw/upload/files/10961905251.pdfIn PDF document text
    • http://effekt-film.de/files/file/3162708865.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/41491287253.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=photo+video+hiderPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DD 9932 bytes
SHA-256: 92bba45f8090cd0ffdad68c075746054c2bb6aaff41cf24a3cc66787ef23a5c7
font_01_sfnt_off0000dcf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF2 19892 bytes
SHA-256: 6be831c6c53952c84291785d6d1b6fbd1cf70309df457702dc8423bf4180390f
font_02_sfnt_off00011184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11184 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1