Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d2f350a3c1992a…

MALICIOUS

PDF

89.9 KB Created: 2021-09-05 10:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c0f00fa22a6e9b9416f8752fcb206520 SHA-1: 0c0a151c96f69c3c2a1a8dbe8c2786b8111f0375 SHA-256: 68d2f350a3c1992a8d620677f6010f075f253ac85fc3452da6b7dad0743a6d49
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised websites and potentially malicious files, indicating an attempt to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of specific execution methods.

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://xanbiente.de/userfiles/file/71427736186.pdf In PDF document text
    • https://avenue102.com/uploads/file/dejivosiwarufexoninavo.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/pemelaxiwelasavojibe.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777afac7a20---18306586878.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/2fj6d29ptihdghvkqbr89iphg5/95531762529.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/96446155774.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160922e482fd26---matalojugid.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16081d05e7291b---zosavuwedonuwiropusotu.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f10fa01fe8---66159347724.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210827202851.pdfIn PDF document text
    • https://angkalaris.com/contents//files/pavejitesigorisetijiwurof.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beaf3251881---remepizareduvavu.pdfIn PDF document text
    • https://drsaman.com/files/gififubakidulukaf.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/bawebazud.pdfIn PDF document text
    • http://alexandercdg.com/clients/36029/File/wusajalixojaxojixuxet.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92059277612.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/64462731741.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/dd77b07403eaec854b814f15c975eb47/32022241146.pdfIn PDF document text
    • http://hnysft.com/d/files/44333425813.pdfIn PDF document text
    • http://vetranhtuong.info/luutru/files/mikoruxaved.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/37328670647.pdfIn PDF document text
    • http://grandbarnettfamily.com/clients/a/a0/a01b80d98e57c38af56892ab55e7d82f/File/39065025892.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713f89197ed---favewedixasedej.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/vifibudilimezunizo.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/nesazatezinefuvozeba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=ecological+footprint+math+support+worksheet+answersPDF 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_off0000f88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88E 11188 bytes
SHA-256: 47be57b34c7a7fea49120e71e4b4405911365868b79a6cbd218ee742a38f63e3
font_01_sfnt_off000112a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A4 18104 bytes
SHA-256: d478487735917e21d46a8e73cfd5fe5c2fe656e37511387df36a3bd93e6b760b
font_02_sfnt_off00014166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14166 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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