Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e62cf90c1f5ffa…

MALICIOUS

PDF

96.2 KB Created: 2021-09-08 20:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: e2ee61571f6068ae3ad76731b3fb1ccc SHA-1: 068c530c26c58412ae0784443da82decfb079092 SHA-256: 85e62cf90c1f5ffad7d6fc26001485273ce1f80de428280d9d47a8cfbdc2519d
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure to execute commands via the clipboard, indicating an attempt to trick the user into running malicious code. Multiple heuristics indicate the PDF links to compromised websites and potentially malicious files, with one URL specifically pointing to a file named 'wavabibexe.pdf'. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://carraracucinecomponibilitrapani.it/userfiles/files/36157713216.pdf In PDF document text
    • http://nicolalazzarotto.com/userfiles/files/zobemanopo.pdfIn PDF document text
    • http://ipllaser.in/uploads/34446994013.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16132dddbaa711---48612819744.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/vuferusonujupanukod.pdfIn PDF document text
    • http://purel-biopharm.com/upload/files/xozobijixuferevis.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16133821273748---1100969182.pdfIn PDF document text
    • http://printific.com/images/contentimages/files/kowomufal.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/49987853543.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/afe72dfdbac18193d1c0cdfd5cdeaee9/91424723862.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161376f67bde77---46228310074.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133d52278404---tawevijanujuguj.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/gotewuwakexaxujotezixo.pdfIn PDF document text
    • https://akemi.ro/hirek/file/8631434214.pdfIn PDF document text
    • http://szamosiszerviz.hu/feltoltott/files/bemodivazixelowuguripogox.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/47305558906.pdfIn PDF document text
    • https://cuatudongbinhduong.net/uploads/files/kuwunazipisoxivubu.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb231d6d12---wavabibexe.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/161374e991adbe---susejulufuwubirawasamaf.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/91014670503039484b9f8ab827ab5d1c/67973236406.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/gurulabasajasitobosujove.pdfIn PDF document text
    • http://www.smpnuenen.nl/images/files/64128146865.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=manual+de+usuario+samsung+galaxy+j6PDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/pofuwifav.pdfIn PDF document text
    • https://unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/99312228922.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_off00010dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAD 11100 bytes
SHA-256: d3ec935beaca9584c203b94bd3744a48efa5f3aa5522427132fc3b6110918e20
font_01_sfnt_off0001274f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F61 19176 bytes
SHA-256: 14b3b03105dc2dc1264e4b7a8cf82d720f3d578b5d509ce213ca96c0bdfc5c23

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