Malicious PDF — malware analysis report

Static analysis result for SHA-256 0398746f191d1984…

MALICIOUS

PDF

88.7 KB Created: 2021-08-06 18:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2a73d0167ec8e6923ac2f6eae6294768 SHA-1: 10d15f27fde9f5534f34ea6989d2f3751ffa9989 SHA-256: 0398746f191d1984534fc59aa2b566f02ac9ac242d90851d3aac1cb5e2fb9b92
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1059.007 JavaScript

This PDF document is flagged as malicious by ClamAV and an ML classifier, exhibiting characteristics of a credential harvesting lure. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute phishing content or redirect users to malicious sites. The heuristic 'SE_MFA_LURE' strongly indicates the document's intent is to trick users into providing sensitive information like one-time codes or MFA approvals.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://dagmar-e.de/userfiles/file/popagumonizibipamivewe.pdf In PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/bd5a8155a25f683a28a9bc1ed8680e8e/borakexipurotelutotore.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/45500879023.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/seronadogiwen.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ce123c1d57c---kutuluxidowasunasepeboda.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084130cc42f7---51377047863.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/924c7739d530626777c6687e66784b3c/zodug.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/b4038820c7baaa9355f5084e6a6851f9/4321401253.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e8dbbd2ac---42752205305.pdfIn PDF document text
    • https://soechi.id/userfiles/file/datige.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4e771ca2e---40786226071.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/silejagutufubedeno.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609be124dc5a6---tewukapa.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/b13061562eabd0ce8c3230552ad8e2c7/90986253291.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/97939478914.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/xujixunizijodenusoro.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/21d9795dbf7cc0c2dc619817b5d1e571/faluwokevari.pdfIn PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/pezivuzigalaresop.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcd7850be7---fitupakexokuw.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/netowimopunitevam.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f1caf79d9cf---nerun.pdfIn PDF document text
    • http://nessium.net/userfiles/file/62756082040.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/6sjbk73utebke8eftdb5kuj48k/39634160754.pdfIn PDF document text
    • https://www.agcontraincendios.es//ckfinder/userfiles/files/joselinif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+improve+call+quality+on+androidPDF 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_off0000f514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF514 11012 bytes
SHA-256: bec752942ec54b37b34ab9883e27b58bc40203f67ff5b52f31e6871d1c2760de
font_01_sfnt_off00010e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E71 17388 bytes
SHA-256: 2a3f8614cf44cfbe355ae06735f9297725c47fc5fcbfa62ac6f722450b4f2938
font_02_sfnt_off00013bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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