Malicious PDF — malware analysis report

Static analysis result for SHA-256 89aa85ab5166ab3b…

MALICIOUS

PDF

69.2 KB Created: 2021-09-28 18:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b6879a216efc09d4a4a5a22996a9fd30 SHA-1: 236adbdd411c59019fe9a8357b0fb992b18d157c SHA-256: 89aa85ab5166ab3b82fcafd72e466c3809870b65156d7411adc921bb6201fde3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pixomot.ru/uplcv?utm_term=toca+life+world+apk+full+version PDF link annotation
    • https://htchninc.com/d/files/17466451151.pdfIn PDF document text
    • http://giteduguedesboires.com/userfiles/file/81059783200.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210913231144.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/lovivukeminuruf.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/wemijagowusobati.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161521fcb39de4---76762206665.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/naxuwawizar.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/64434036809.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/87186019016.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/lifusi.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/vezom.pdfIn PDF document text
    • http://skncn.com/u/files/22107428321.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/60690537820.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/vujajezabibekopa.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/49511638630.pdfIn PDF document text
    • http://puisan.ru/uploads/file/4995581993.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/sobafo.pdfIn PDF document text
    • http://intrinhgia.com/admin/webroot/upload/image/files/19066011581.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/94653774231.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/68247940032.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/cmhcpgiheob48u60ehbrslki5u/zapis.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/loridokuvutafexifinalipaz.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/46412740182.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_off0000ae02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE02 15844 bytes
SHA-256: 3dcaf80a32cdee9f3b72c54d0a4008da2091f2acde413c1d88dffb207d9a8809
font_01_sfnt_off0000d614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD614 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 10820 bytes
SHA-256: 3a42277754c2fcb9ca8df226f84e235abffc0776a1ca9854c5859eaf9ff66fa0

Open this report in the interactive analyzer, or submit your own file for analysis.