Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7775ce48b17ad6…

MALICIOUS

PDF

81.6 KB Created: 2021-08-29 22:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4c84f6ee03c47c065a38820b5425b77f SHA-1: ee264e8e3f7622df79f6b66c3dc0497b1d8d49a4 SHA-256: 7e7775ce48b17ad681bfd950ccb05e30187088cb10716ada70d31290ffb9c30e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing attempt. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to malicious content, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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 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://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdb00e9771---82939271502.pdf In PDF document text
    • http://spiregene.com/image/files/20210718_222512.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b510def04a8---muzek.pdfIn PDF document text
    • http://stattus.com/assets/file/loxenusaxu.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/dutobason.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/c053548e084d2dbb022d5f0c61f38508/97959892313.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/xevezovu.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/pizasadid.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/38606323071.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/gqorss8j4em169epnct90rnto5/ketuwovezivazepemeti.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a36cf5817b2---kabanifaxexif.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/nuwigezomeli.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0da74929a---kinorevese.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/519786e9593d15ab8f129d443e85d104/bosefegalozodetowil.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/46397155204.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5346e94d83---92281392396.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/sovobolozekinar.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/23045650379.pdfIn PDF document text
    • https://yuss.it/file/pukiwufasosilonika.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/93934682282.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/95531589008.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/bb4d9298d841e6b5b1f684d4f4b84c80/51285388273.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/23042732737.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=rd+supekar+computer+science+11thPDF 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_off0000d780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD780 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF92 18492 bytes
SHA-256: cf2ab9e6166c2ad63718c0d416f930d5fe5ff449771487e9005f364143a9dce0
font_02_sfnt_off00011fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB8 11020 bytes
SHA-256: 599b3339d2e25b2d1b418e5342eab3d53dbda65a9eef07c0b9eca1bb8f54f50f

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