Malicious PDF — malware analysis report

Static analysis result for SHA-256 217d86774af75fb3…

MALICIOUS

PDF

81.1 KB Created: 2021-09-18 03:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 97ef549eb5fd282500b89cf9339eb276 SHA-1: 9d06811e59035c6e7487ab9ffea3d7c2bf551f00 SHA-256: 217d86774af75fb34894f0930f7754b60225e140df1801185af7ada6c875f26f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host and distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://oniceh.ru/uplcv?utm_term=freezing+point+of+acetic+acid+in+celsius PDF link annotation
    • https://anyimaker.com/upload/users/files/sedakivulug.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/xogufijoturevarijikas.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/22942663550.pdfIn PDF document text
    • http://lepetitjaunais.com/userfiles/file/xusedurodaj.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/73dd5067b710c7ca8b8d6480e1566c79/94916776409.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/duvaxarem.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/kiboxogafoje.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/katex.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccf49b8468---kebotowumubebitaz.pdfIn PDF document text
    • https://xn--23-6kci4asohe8k.xn--p1ai/userfiles/file/9901280856.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/tagarudefifirifakovuviru.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/34977978985.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/xubira.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/14040469061.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/dawisovenonifudu.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/14956758835.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/xilapimupasorovet.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/viwewufipadu.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/96081360825.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac9bd9559a---wivedexotozaduvukobapu.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/051006168242.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/48578898146.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613256dde06a8---5001202663.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/78964570857.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_off0000d81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81E 16844 bytes
SHA-256: 35945d2aa363094a6b6e23b8e04aac34f9b77495d1cb5f330b37d9400364b5cc
font_01_sfnt_off00010363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10363 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7A 10932 bytes
SHA-256: 05645a20955af8a163110233bfaa0ac2a7aedafe2e2e1b90ab35400f5dcdded5

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