Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7f6567ee175e20…

MALICIOUS

PDF

90.0 KB Created: 2021-07-13 23:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 77fa8a3995e54745d39594fe7d26e67b SHA-1: bcb92481a89dfac6b993073b08f3ff58556f409f SHA-256: 9e7f6567ee175e2046fbd9172fc1aeb8e81e53988c6097c8f3a6ceed35127b06
196 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a credential harvesting lure. It contains multiple links pointing to compromised WordPress sites, suggesting an attempt to distribute phishing content. The presence of MFA lure heuristics indicates the document aims to trick users into providing sensitive authentication information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/75052d7dcb9cebb27237611cc22e59cc/vurawebi.pdf In PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/9ab8c894535a2689139ed4afaefe025a/bapaxijamajalofifol.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/oc2ju96tuor4v11l1no2idl27u/seberetimexusobidupuwa.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed803cdcf9---tedelesibelexebivafedulob.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a28317ed293---42288050327.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b87c47e01af---29371449108.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/deborusalerekujoleguki.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/b7701d60d1db016fd2667675add5938c/tozomadivapibuzoj.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/u33ouccrjebbf4lpcqjkvbcnrv/gemiket.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a52d873f87---11185004847.pdfIn PDF document text
    • http://sam-global.info/files/file/lanekajawimizaj.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/40266cd8b3173ecb432096e9cf788fc5/24434833392.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/050a8f531ae3002af37924db686c2e17/16733878798.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/81416076337.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac999656a07---zuzoxuzilalironitokuda.pdfIn PDF document text
    • https://gangnampools.com/contents//files/28813918371.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/23744665665.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607123575515e---xewirex.pdfIn PDF document text
    • http://vejwun.cz/images/lasejiwokupunuzozaz.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e23b11cc53---92394957991.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae7a2027a6---44132517067.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/kewogunasudefebaxok.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/matapowibuvowag.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/reborun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=wow+champions+of+azeroth+reputationPDF 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_off0000fadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADB 17844 bytes
SHA-256: f9e844c7fb93e7a4616e596f0d8875a02763538562befe6f3a2a668b0ebf1737
font_01_sfnt_off00012919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12919 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14130 10936 bytes
SHA-256: 36e038c1e545b5348661b665a6b34f57d82ddfe47859ba7de829e92bdbc290af

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