Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fdd4dcb278b22d7…

MALICIOUS

PDF

84.5 KB Created: 2021-08-24 18:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 328324b96072942717fe702a2ee6bff6 SHA-1: 02fd07f8f18c01f2bc36e15e4871248bd35ade3d SHA-256: 5fdd4dcb278b22d77f858c5044f72f5505561e094879f53dca1e880ddce7f0e4
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and embedded URLs point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://ozari-ua.com/files/file/40261674712.pdf In PDF document text
    • http://asesorgubernamental.com/images/file/nixerek.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b96f548ad1d---loledogagazo.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/zigurodekuberivisegi.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/xupopubiv.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d54963cf3d---lalofeluzavepumidupaxu.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/lasogojadawuzed.pdfIn PDF document text
    • http://dgn89reunion.com/clients/862287/File/luvul.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e885273aad---jimonosimabatupanolaxerel.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2ecb7e206---40482927282.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/73302671676.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/f9fac28b92179bb3c3188afe373ff827/8797984614.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16121ba0708850---59220391882.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021080806524473499.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5482ce24c---xotazilisapesizane.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89bb6e0746---zekunotopapibajabe.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4494421e1---fetefuberazovivo.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/4l5qo8n943fsrd46f7pk8n38vh/larudasudufatixuga.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8816ca5bb---88973148396.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608120f62656e---vedunujok.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab4b278d48---rozegofufus.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/lapomalomuguzuj.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087eafb156dc---ganixakotuxajotowozude.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/addng5isfm067ql43gfeksa1u6/59043666276.pdfIn PDF document text
    • http://recviem.ru/img/upload/xuzoritilago.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=bugs+that+look+like+kissing+bugsPDF 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_off0000e5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DA 10672 bytes
SHA-256: 1944fc260e32ad0ac5cd16be5d3742c3900c2ba3f2d35fe3e02826c65bf538a1
font_01_sfnt_off0000fe49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE49 16800 bytes
SHA-256: dc12ac36556bdeafc6ba1c326f7dc0d5046032357c91c788ea48da131deb3000
font_02_sfnt_off000129bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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