Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ef0b08a836d412…

MALICIOUS

PDF

84.6 KB Created: 2021-09-18 19:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 114b655edfec6e942dae0d2f0a461970 SHA-1: ddd75a1263ad89e00f058de94f90f955aaaa52c5 SHA-256: 46ef0b08a836d412716f17705e304f11f082fb6aa80538ec2f9e8299d20a9e64
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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://archism.ru/uplcv?utm_term=devil+may+cry+3d+android PDF link annotation
    • https://walnutcreekguide.com/wysiwygfiles/file/xadepotejozemanexejevod.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/19230683614.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/69069683172.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/f1f867574304526af62a063bc128cf3b/jizadan.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/94215656119.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145ff29cfb9b---kuleroxovepewajuratemot.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/3492811981.pdfIn PDF document text
    • http://physio-praxismitte.de/userfiles/21497420451.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/92277850584.pdfIn PDF document text
    • http://maymaygiaydachidang.com/upload/files/koriligajomi.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/nuxefoxepaxoroxib.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16144b93105a48---mewuviw.pdfIn PDF document text
    • http://parateam.cz/file/95980929817.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/soluzegotetejugavadajami.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/27638113141.pdfIn PDF document text
    • https://doanhnghiepvietnam.niengiamdoanhnghiep.vn/img_duhoc/files/resopixafudigokekelana.pdfIn PDF document text
    • http://aolisenjiancai.com/data/files/27006061463.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/11321427225.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/16697700221.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16140959691abc---fisugiwolalegiv.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/sexopikatuxefojov.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/sezaxugenenitir.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/26c218c1e35c3e24597e0488f8246e76/42457806600.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/70597156832.pdfIn 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_off0000ee45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE45 10620 bytes
SHA-256: 4b37ce7fd57d39c1af809c42fb776ef92bea7d4a9e8e2533f9f149c72a301131
font_01_sfnt_off00010687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10687 17520 bytes
SHA-256: 4ac5520d7a07992a1efd05c67656809fd2e5831dffb9a728170f077e1082ec72
font_02_sfnt_off000133be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1