Malicious PDF — malware analysis report

Static analysis result for SHA-256 648ac9e17ec51e2f…

MALICIOUS

PDF

80.9 KB Created: 2021-09-16 21:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4d61f0e0d4cce50728927677a95f1c70 SHA-1: b5bc79e64f29861ccf2ccd255027678bacc7f578 SHA-256: 648ac9e17ec51e2f4f25ec2bee15f8c9ce01bfd02eb73c04289cb6ceb3e0a47f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and external URI links. The presence of multiple links pointing to potentially compromised WordPress sites and disposable hosting suggests a link farm designed to redirect users to malicious content. The PDF likely functions as a lure, leveraging embedded JavaScript to facilitate the redirection to these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=tap+to+wake+apk PDF link annotation
    • http://borisovhlebprom.by/var/upload/file/gofuvekelidim.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/gomasanup.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/86815402102.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/pezapiniro.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/logonilejonuninatufaj.pdfIn PDF document text
    • http://orel-trinity.ru/sites/default/files/file/rerononitexelemelisefex.pdfIn PDF document text
    • http://kco.su/userfiles/file/56672916946.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f512442700---vetepidaworuviwatakum.pdfIn PDF document text
    • https://lordoptika.hu/files/files/momifalegepozejule.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139ae08004d6---87715059361.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/47760239175.pdfIn PDF document text
    • https://felicityokolo.com/file/fomifaponekefipo.pdfIn PDF document text
    • https://zibarajabi.com/cache/fck_files/file/tuxava.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/segenufobunubilusugoja.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/dofuwojupudimas.pdfIn PDF document text
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/46736086832.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/lurajikaxelakofiw.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d65813a8ea---giledeled.pdfIn PDF document text
    • http://rbc-bezorgdiensten.nl/upload/penepunu.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/3c1a6790feb7226708df91c5d593f900/dixoxu.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/42951844025.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/80321851603.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/29660436763.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/91847384085.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613567f26f20a---14804288381.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/zowozuseta.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_off0000d897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD897 18012 bytes
SHA-256: 25a8fc3c71af2ba245df931e3c5ac39d4568e08ad005218b6a8b788da72828b0
font_01_sfnt_off000107cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CD 9876 bytes
SHA-256: 530bce0a441344451aaedfef29bf3402e48d789106f6901e67315b9254de8abc
font_02_sfnt_off00011dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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