Malicious PDF — malware analysis report

Static analysis result for SHA-256 2036ebda63735cea…

MALICIOUS

PDF

80.2 KB Created: 2021-09-03 18:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 152c34ebad601ed9e7dc93cb3624c041 SHA-1: f498e40d60513400d7dd85030db234b1db383378 SHA-256: 2036ebda63735ceafb3d51298115a252438eedf562ac042f80eb5c3f5dac01a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, which in turn serve further PDF files. This behavior is indicative of a link farm designed to distribute malicious content, likely for phishing or malware delivery. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://huntic.ru/uplcv?utm_term=carrier+heat+pump+maintenance+manual PDF link annotation
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/e255dce46ddea940a78967b464ef74e3/tizogejizobalir.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/21330216537.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/121976474.pdfIn PDF document text
    • https://longhoang.vn/upload/files/nesabuwuz.pdfIn PDF document text
    • http://www.aunay-sous-auneau.fr/ckfinder/userfiles/files/fodaxevigiseriwasolapige.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/bomebaxab.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/e1fod40l92dseoj00kufii84p5/rilesatip.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/lajawikojidozoregi.pdfIn PDF document text
    • http://zxsolar.com/d/files/70541570456.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/71e1aee74e5f9e553f3505ef0503795c/fadadamibuma.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/57107220663.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d3a339430bf---59381612243.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0303e8af32---39044674826.pdfIn PDF document text
    • https://aashianarealty.com/file/namipegibikojokowez.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714df2930de---7436195563.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e19b519d9c---81230284926.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/gajozazufazikizuf.pdfIn PDF document text
    • https://anfauglir.com/images/file/96958197620.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f91e0b4a923---81649677497.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160da920605817---letugonu.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/14840712137.pdfIn PDF document text
    • http://magicdiscoradio.hu/userfiles/file/41722317402.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_off0000d6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DF 10480 bytes
SHA-256: 853ae673e5ae255d87cfd79bbe862ee409e736fd8ad0ee70c3ee3eb8a691c717
font_01_sfnt_off0000ee7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7A 17252 bytes
SHA-256: 3b68cdf368d586a24bfb8a1751feb90ebacabdad8997170be1f088829b30a187
font_02_sfnt_off00011b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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