Malicious PDF — malware analysis report

Static analysis result for SHA-256 032db4e54f45d4b7…

MALICIOUS

PDF

87.0 KB Created: 2021-07-30 02:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9bb7e13cdde0cb2e9c3fc4326d7ed80c SHA-1: c54ed286dc8787c0f7db6a02abcaf10db1344959 SHA-256: 032db4e54f45d4b7e49acba29d526ef35f2cf0896ddb3ccd3840fd26779501d7
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://drafthe.ru/uplcv?utm_term=fisher+and+paykel+dishwasher+fault+codes+f2
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9df93eecc5---vebakeposigizunitelatod.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ed4474c25---58140433222.pdf
    • http://mya1fc.com/files/ckuploads/files/mabekanunuvobexirepati.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/d55eef99ec2369dd93750902953ed907/kazalezizerezi.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e1ba1ea44---87234201425.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/325n67qjooh5juvplvg76sop8h/60086615333.pdf
    • http://schmetterlingsgaerten.de/file/nugerodugozizokabapises.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/da156e8599018b715e5ae7037714b7f4/gifinixupav.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/ifnkovoptjduiv6pk7pos9bsb4/2169723313.pdf
    • http://pbsdeltarho50events.org/clients/d/dc/dc3fcb918f61c9276c5829b035df2abc/File/13287256604.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/38e9ce064f8765032e9044c0fe578973/32865466659.pdf
    • http://jcon-aps.dk/userfiles/file/gedebozimes.pdf
    • https://fotoprint.lv/downloads/file/numalizarosodev.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/vhhqudu5fpvjpvdtfjcmgko3oi/31244220684.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/4fcf99ca1e9dc23024ceb46a169ae0ab/44270980323.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160844a955db8c---manip.pdf
    • http://titadoorbinhduong.com/upload/files/fawijojikokil.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/f14c3ec33fcaf4e8bfd090850c40be59/vavolulitu.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/042eedb51134ba33f74450922012b393/87511157069.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ceaee5fa9f---xutolukivubemedid.pdf
    • https://scavilecis.it/userfiles/file/bakuwaxewapurutozapedu.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/9iue0tljv3e79l3mcssajek0eb/bupomivuweben.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba8fa920e7---59187470640.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2a5d0c1d1---69894092420.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc3.bin
2106f6d059fec6409b3b5016ef4c3ef6974ca94fa61f41180e49bb5ae2d57076		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC3 17696 bytes
font_01_sfnt_off00011bdb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDB 16792 bytes
font_02_sfnt_off000133f2.bin
92040ec47439b0fe5ca46e1064359351bd10b95bfe654af7879fcb592a66b9cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133F2 11208 bytes

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