Malicious PDF — malware analysis report

Static analysis result for SHA-256 12719a51c5f55643…

MALICIOUS

PDF

83.2 KB Created: 2021-09-06 23:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a74a027fadbff1772a403452a0840ce2 SHA-1: ff3d3ee73378476b82b9f85f3200506088d7f192 SHA-256: 12719a51c5f556439d166915359b3fa0c75079444cd840ae9c3ba6ca122bfe2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is unreadable, but the heuristic firings strongly indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=inogen+one+g3+instruction+manual PDF link annotation
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31bee8374f---54185237023.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/roxuvorazolodugim.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/tulalavak.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/maxasemimoboserem.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/98e1850452b7a6547b2f0fb167804424/81837235421.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/47co8r0mu4rossgch2tns7ngt4/levitaziwedagedodasin.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2d732d6564---tanerarogegogijutixofu.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/vusosites.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/solajazukijevep.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/junexibelukaw.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/27810391081.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fe83b3e14a8---jedafetakoledojuwofilam.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160a92a1004220---70561810119.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/hejuj63k4o10juf1qqa1sksvjp/94092263980.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/j9n1sisbb98ifvlgpkagagirg7/77297672701.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210630051001.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/ritizow.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbdfc656280---69967820214.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/90318150855.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/75881232018.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/rumagositupogume.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/gekemexatazobotol.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_off0000da7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7F 10796 bytes
SHA-256: bb62dbcbe5893d194ef113ac87703d1a43b8c2bc35f7e6f2654e284f9bf11bfc
font_01_sfnt_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 19552 bytes
SHA-256: be7ffa8b77f3a0ffd71ed04dcb36d326c1e21134cecdac4144cd00da6e507d84
font_02_sfnt_off000126c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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