Malicious PDF — malware analysis report

Static analysis result for SHA-256 0829595031a51237…

MALICIOUS

PDF

100.3 KB Created: 2021-06-17 23:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 31da87bce524930bf8934578b0d851da SHA-1: e9fb0109559c215d3ea13a04862a94b2cb020200 SHA-256: 0829595031a51237571901982c705229c6a3d62c97bf8e53992aa0be9368f39c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which appear to be compromised WordPress installations or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pixomot.ru/uplcv?utm_term=bewafa+status+video+for+whatsapp+download PDF link annotation
    • http://asja-doll.ru/userfiles/file/namifol.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca3bfe6187---nisaro.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ice1ksvbs5h5rl3mouq1lcjsuj/36483501960.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070422776b0f---zopakopezi.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/0jij4m25qhcpntnc66dl37mmrq/boxisewita.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/79744284793.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/72094391510.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/6636431390.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0402c93d2---ramugebeseregusuvareti.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/dupomimadu.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/89d8c44c72ae3bf8d48409c2dfb0612c/dejekimasonadawid.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/dofutabubemunanetavazuw.pdfIn PDF document text
    • https://dhcom.vn/userfiles/file/mazinaleginixuradulal.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/27583d0050e1ef276ecf7aab503083be/xikinosepuxumug.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/zuzafisaxapekis.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/493820280051247d981171229f70eed8/fepisuwuvolonox.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1606e21c078fae---tokukaboridiro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FC 5332 bytes
SHA-256: d5ecfe518fdf7395eceb93da22b1f647de46e8469f76f4c2ae8b21ba0ce734d8
font_01_sfnt_off00010c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C31 3720 bytes
SHA-256: a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9
font_02_sfnt_off00011789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11789 1796 bytes
SHA-256: 2392d2a4036d2cae249f7277ae14739e0990d25251d4373764733018c1ecb564
font_03_sfnt_off00012015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12015 10616 bytes
SHA-256: a1cfe7d8a9fce4face46a8770de1530479a289d833a99afbcf8cab1829bfb2dd
font_04_sfnt_off0001446b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446B 16128 bytes
SHA-256: bd87478a769de40436db160e6513fe2a89a9371e132213eab7710361a2ed5158
font_05_sfnt_off00015997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15997 13872 bytes
SHA-256: 5f53fbe624afd43e6bed40f651a64ef8ee4422841550b481dea4a9710d9ed4b2

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