Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb62db5009c5d608…

MALICIOUS

PDF

89.3 KB Created: 2021-06-18 03:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ebcfd286ae8fb0cd881bb65ddbb64b82 SHA-1: fbf85f19b3be8223406e1dc63c353d2b32972c42 SHA-256: cb62db5009c5d6083b2443108eda5e57329c841cc55300d94604e016807c37b6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body is heavily obfuscated and contains what appears to be metadata rather than user-facing content, further supporting a non-legitimate purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://botosani.ro/img/uploads/file/salaxogaz.pdf In PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/de2fffa61c06e09b7b5a5dc38aa29ce3/33626927944.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160be07d1d7654---76119412619.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/12be7db60f3d9cae54add6d789c80ca4/9526072024.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abc28faff25---15821969082.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/rojalix.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/4140786da2d3b88939e4fe540c086663/gafiwepefevozapovix.pdfIn PDF document text
    • https://jetaime-shop.com/files/wigojuzesiwojuwumib.pdfIn PDF document text
    • http://tebsc.com/clients/84181/File/femofi.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/c052474ba529e8c398123cde15698a8c/47662997379.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b686e53cde36fc7450cac5358f14a6a8/53007107983.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/rimijinixema.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/2238089923.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4d9466869---pikifovurubotubo.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/2b6bc2a1a9e76c69edcc11d56be6d288/80669325635.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=asus+rog+strix+b450+f+gaming+socket+am4+manualPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEA 5816 bytes
SHA-256: fce4840f56fc03bd2bea3ac81766e80b714c9e14ff28d613c0253e87642fe8f8
font_01_sfnt_off000102b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B5 8580 bytes
SHA-256: 07f1c7a55963802a00e1ffa33c745117f15038aab239726a019d48d1fb805877
font_02_sfnt_off00011a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4F 11620 bytes
SHA-256: 6921b073f8c23588716bbbc49be59dce41a4f8a645fb5180766abe0f7badeed0
font_03_sfnt_off00014256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14256 16120 bytes
SHA-256: 6b5b3b63d57e6d34228c0a8a5979c68f547506b81bee47a0f7c159d0d610a276

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