Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0131f290411689…

MALICIOUS

PDF

73.8 KB Created: 2021-09-04 05:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8f1e35ea7a08e0ad5e073c97e95c7404 SHA-1: 535395fdf36e8b1ee3ae0bd56040f069477e3afd SHA-256: 5e0131f29041168921a4289a3fc591e27d245d8d7d28dda91c7a0cf2a0974dd6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

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://wastran.ru/uplcv?utm_term=text+features+chart+pdf PDF link annotation
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/jepesipatizifovebef.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/dimetunufu.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/75912064414.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/kaserufuvuzavubilipuz.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/61904171139.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d68ee27f2---61310917841.pdfIn PDF document text
    • https://essuances.com/ckfinder/userfiles/files/sukezajuruvo.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/vegepagifadelokuvipovulow.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/6adbf76ac83470bc9d52d7dc2cb48ccc/jenudakeba.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/21578066599.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/70a0e8d5fe7bc925ab1c7f0f0352f823/32787800508.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/jabofufe.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607892ffa5051---99834506070.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/xusanobipiromivajefonasa.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120a3721ef54---lewibemagixujenadoke.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/a1e9b360b4b56c07db2b6894261b2aaa/poferegivejazavadi.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/kelisopabaxux.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/aaf92549d0f5532ba26ed6cc97c69303/86579821123.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/zenosarum.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e131c169a22---94818962208.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/45465655024.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/1cc084b505ed299eb32b3d662469a714/wibugifabegubokeja.pdfIn PDF document text
    • https://goodline.by/userfiles/file/faxetuxazun.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/98612191566.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/dodite.pdfIn PDF document text
    • 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_off0000c0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD907 10520 bytes
SHA-256: 96ed10b78c9764b16f8cc01c9636d35f96c53d9e37d9d0a969c021534838bda9
font_02_sfnt_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 15724 bytes
SHA-256: e1dd8c1d96db95843447fd7127324092996682727a9d744f634bc325e32b95ff

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