Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f926bb344b66953…

MALICIOUS

PDF

95.5 KB Created: 2021-07-24 01:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 417c445cbd3b118711f4cbc50c042903 SHA-1: a8cf73365bb1fd9a206871458d2de26b78ed2f77 SHA-256: 2f926bb344b66953bd84aef31a46ff8755fd10ef72447999607704263f9ee377
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised CMS upload directories and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous unknown URLs further supports the classification as a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082394b2bc85---71962136830.pdf In PDF document text
    • https://areicon.com/images/file/21817279392.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/woguvigivifuwezitagasofa.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/99037833495.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/vlbvjonqohj951gq8v7o6adqbi/botajikigimikuzabawolami.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160adb1a9a525e---50711505047.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f59d486be28---50448105796.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/mazezijubixuporaxivika.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096aecf58a23---futogaxefevirumalarole.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/05f705bcdfb7c7f7431fb7afaaf9c18f/nomikozaxavu.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/3bbr6051u4ti5s78v0rc7a0qa4/wulujefawinofiwufepej.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/270c90e6bd912da1d784559291a97495/xizuxisera.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/cedce162d4452d91eb03540991a9c078/jedopiw.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/58637651072.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/pigelesijanofe.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/biwuxidagekadefegap.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/jasomid.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/xinolumusidutogoxubetimam.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/72fc2dsk64q5kpi190fccpb913/93287058383.pdfIn PDF document text
    • http://www.papelerialapiceros.es/ckfinder/userfiles/files/lonusu.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3276b6c9e---robukebus.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a883659c02a---galagovajuwulosib.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/guferovopoko.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160844bba4510f---6077281823.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=cydia+apk+ios+14PDF 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_off000111bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000129d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D4 10272 bytes
SHA-256: d136c78df1ad738dedabd5d9bc2b8e5bd037f310abc4817223605ff2f8270be0
font_02_sfnt_off00014125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14125 17484 bytes
SHA-256: 27ead9a0e1d22646b8e658bcf75f7fb7b12b3534fc6c77010dcb8f317eb242c1

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