Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9915dada929f87…

MALICIOUS

PDF

92.9 KB Created: 2021-07-29 22:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 583841b86172122a005efee4b60e6ad4 SHA-1: 62c31b1efbfc399f3741956c405ab29135826b14 SHA-256: 6a9915dada929f87ab876b7501d10182b984bac2eb97a11453389f51a42c4e38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It functions as a link farm, directing users to numerous external URLs, some hosted on compromised CMS upload storage and disposable domains. The presence of embedded URLs and the nature of the link farm suggest an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/6c9f1051bd5520a4df5dd6cfce4e3b0d/muvaferemosuwevawotipeda.pdf In PDF document text
    • http://vp-dmsh.ru/admin/ckfinder/userfiles/files/kawixulinutuxijed.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/sonodadenoziw.pdfIn PDF document text
    • https://menu2uplus.com/images/file/tekaredagulumisite.pdfIn PDF document text
    • http://grupophi.es/uploads/files/12988461534.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/7d5aa34a6926feeb9c6d902d3068a67f/41345670597.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/2790af3356cb2164a12ad80aa1907228/surugevenune.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/76uh9q1psgfbk0e3u082n05kr5/xegaziwexuxemosesisemad.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/88309893692.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/15echapg8umjm73m1apqc2r6r1/pusexeruvevabil.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160931c7ac4ce5---jovuzafetoxupamo.pdfIn PDF document text
    • https://majubesar.info/contents//files/1193050698.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/12182009927.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f88a743ce---3347621536.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/90660948874.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b360378f---7023635833.pdfIn PDF document text
    • https://raptiherbal.com/ckfinder/userfiles/files/76831568546.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/cg5dsijr4el0mrj6as3hkevhjh/59769399042.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606c96247942f---15717436306.pdfIn PDF document text
    • http://ehs1958.org/clients/73155/File/bawipubapug.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b28db15c---mibakaturekezubuninumugix.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/kagipapuvifuwulufipiturod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+disassemble+nordictrack+1750+treadmill+for+movingPDF 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_off000104db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DB 11552 bytes
SHA-256: bf994cac5a61cd7f356f85ed204e9b8a93d11eefae28c4f3d41b85379105ea8d
font_01_sfnt_off0001202d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202D 17008 bytes
SHA-256: 394fe008757d745f07746eb8aa9d00dbacc677c3da22b57b78d632029a5dcec8
font_02_sfnt_off00014c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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