Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0570b378ef4390…

MALICIOUS

PDF

81.1 KB Created: 2021-09-07 07:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 46fedf536d16ad0da45fda840a41e021 SHA-1: a2406e7e16e9cbfd3ad54dc8e90b41adf8a1ee48 SHA-256: 0a0570b378ef4390b18f6c42aba41d823dd99de245f1a2899d8c5a8c77cea2b9
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The primary purpose appears to be directing users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/nuwoxepux.pdf In PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160923b64d15be---94696973549.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/q9ev5b5s32pd00qg76ogsa934o/84036086513.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/32a7774d5ccd0997ca8e20267273068e/64281136855.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/5649c3604b352fe8dbe2f3f2ec8240e4/gizetalevumeranepojil.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/pokanuvebupok.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d3177f535---82713959191.pdfIn PDF document text
    • http://hogan1973.com/clients/d/d4/d4eda5e2427b34f3a15374adde9a77da/File/deduzebofelarekuxikidi.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/vakajomuta.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/zimex.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1b4e68ae6---xunizabo.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/jisupasugix.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/xowidoletemalibivimo.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3543e3fee---84993602173.pdfIn PDF document text
    • https://jetaime-shop.com/files/56445536953.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/zokowuweweremosudegomat.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/rodusabalesi.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aed177d537---lufademukok.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/foxutaxubavopuvukigiwifev.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/wagasuxalarokerug.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/932a48b4f48c6af9277e79eb677d4374/4960426384.pdfIn PDF document text
    • http://lurome7071.com/clients/e/ec/ec9741bbacd2a64db66b94b03f3cd24d/File/fimanazilazamo.pdfIn PDF document text
    • http://huiking.cn/uploads/file/311542223071.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/33741275260.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160869f21ba1ca---daruwibowiniwak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=habitus+adalah+pdfPDF 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_off0000db7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF394 10372 bytes
SHA-256: e8d4518fa664eb73fdd91601cf804afeadb2e37029584d7566d03abe11fd06b5
font_02_sfnt_off00010ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD4 16852 bytes
SHA-256: 5d34176aece4d4d80224d74e41dbd3e84c186678f311e0a13fff3a2561a50e66