Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f25e03a715a63d1…

MALICIOUS

PDF

83.5 KB Created: 2021-09-20 08:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: b579783c987b087e554e093c6faa0f34 SHA-1: 046b54fc888c166ebf8e5c7dbc9b4232766cb64a SHA-256: 9f25e03a715a63d167d2531ced1202050666b27a398ed5b1cbf9dce4c1a0a4af
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Application Data

The PDF file was flagged as malicious by ML classifiers and ClamAV, and exhibits characteristics of a credential harvesting lure. It contains numerous links to external PDF files hosted on potentially compromised or disposable domains, suggesting a link farm designed to obscure the true destination. The heuristic 'SE_MFA_LURE' strongly indicates the document's purpose is to trick users into approving MFA requests or entering one-time codes, a common tactic for stealing session tokens.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://kanomax-nsk.ru/images/konoxew.pdf In PDF document text
    • http://hevolta.com/upload/file/dafabol.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/rudirezoxexawilido.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/cfc70fef4e5de79dafc52a9f304abf86/botevol.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/1628137559.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/54620288939.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/93478488290.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/gowifeb.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/vorugoremidonu.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/midibutazepamisewas.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/94172984043.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/54314627584.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/lubipa.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/lekovatab.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/12471376847.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/minexinogimenovaterafe.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/19512402770.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/48361198245.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/43304858999.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5683687ae---lebujaxesimefafakoguxud.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147c317dce3c---tagetusojopolinaru.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/tuduvixude.pdfIn PDF document text
    • http://aotem.com/data/home/qxu1780220113/htdocs/uploadfile/files/jozefubetajad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+copy+text+messages+from+iphone+to+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_off0000dc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A0 11312 bytes
SHA-256: fed5c14491f83e7f44ac7d37e3755727ec275b810deecc120c7dd0049e38b30a
font_02_sfnt_off00010ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE6 19180 bytes
SHA-256: 5eeb6224d8ebafa2d656edab57e561aeebd2a42714bb2d22edd69acc15bdb97a

Open this report in the interactive analyzer, or submit your own file for analysis.