Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c69524b9af560b2…

MALICIOUS

PDF

68.6 KB Created: 2021-10-04 05:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e7c7b71e952849c5466d3ddc28c619a6 SHA-1: d3c35f3fa5ca4cd490097282cf8b6bebc9d96bc3 SHA-256: 1c69524b9af560b291ffd96fc47185e486ec4606b95e81fda5fb8b4b84b55107
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The 'PDF_IMAGE_LURE' heuristic indicates it's an image-based document with a clickable action, designed to trick users into visiting external URLs. Multiple heuristics point to link farms hosted on compromised CMS uploads and disposable hosting, suggesting a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://oniceh.ru/uplcv?utm_term=information+processing+system+examples PDF link annotation
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156629e8e6b2---wosapujogufikewewi.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/zijujir.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/zimepavewajag.pdfIn PDF document text
    • http://zawodydrwali.pl/app/webroot/userfiles/file/fafigatodizukokogu.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/dugavibunirikebenek.pdfIn PDF document text
    • http://factorycontrolprojects.com/userfiles/file/gavegalugonuvagibem.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/9485997983.pdfIn PDF document text
    • https://invision.buzyhub.com/files/64425657249.pdfIn PDF document text
    • https://ozsahinotocam.com/img/userfiles/file/30266715675.pdfIn PDF document text
    • https://nenmongdangquang.com/upload/files/bavudogexen.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/vaxuzavobu.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/66654567447.pdfIn PDF document text
    • http://www.toptehnik.si/images/jibipiwaguniwutato.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/zuruki.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/34137487366.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/lofalarogeta.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/namal.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/69135778643.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/64344835958.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/92854434498.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/14ee6f7f828a41e0f58243ccc51ab193/30087062506.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/84922775911.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/mabagisupapakagosi.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/1djr4m84p8mmj6akms8ftmob3j/16178482586.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_off0000af9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B4 10988 bytes
SHA-256: 2f7e963f53d8c104c25cdb15ca02fa1129d6f2abcfb6b25c6c8487f6bbcfc62e
font_02_sfnt_off0000e145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE145 14240 bytes
SHA-256: 6137127443d66a686dbfdacf2b2c014681fe6e7f6863fb91678cafc7f1034fbc

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