Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2a90e9b3d1de54…

MALICIOUS

PDF

101.1 KB Created: 2021-08-10 04:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 38a0c5d9e54c8b4fb3825622481b39c1 SHA-1: a247d7c2f2eeaa03897fb31102cb334a3ff95aaa SHA-256: ae2a90e9b3d1de54b155c22a5f72b172b342757f03cd5d10a2ad9c1abdeb7daa
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification strongly suggest malicious intent. The document body is unreadable, but the heuristics and URLs clearly point to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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 http://work4shop.cz/userfiles/file/69536339468.pdf In PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/32f635907b237a28fa2b91ac947cb0f6/vezizumunabipowidulibedu.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d317d1f5f7---ridoredijuzumekimete.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724d56ede9c---17208765963.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/873017ed6581658b15d0b8272adde788/87782918287.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609225974dd69---27220920228.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/51541778163.pdfIn PDF document text
    • http://menafundinfo.com/userfiles/file/63420594142.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/65397105262.pdfIn PDF document text
    • https://securitydm.com/slicice/file/bawalos.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16083ca5936139---12782521556.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/vadud.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/diraw.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/77063508677.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/56036718735.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/7496741909.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e421be492---47960064450.pdfIn PDF document text
    • http://tv-kitchen.ru/files/files/sidet.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/14432279886.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/2106181656263735936077t.pdfIn PDF document text
    • https://argumentua.com/i/file/porumosenunuve.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/534c5634f9aea9895daaea266fddd2b7/jenorifegopokorom.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/75165332794.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a060df8f5f9---84695145865.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/78572527607.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/1709261406.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=battle+royale+movie+free+onlinePDF 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_off0001267a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267A 10440 bytes
SHA-256: 07918347d099d003a4042a2eaf05afe3fccbd2a7e92f7ba036035f30137cbf68
font_01_sfnt_off00013e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E30 17740 bytes
SHA-256: e62bb616d8e68333bce9ab52730d98c64b5203870afc5494df10c7f9467af761
font_02_sfnt_off00016cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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