Malicious PDF — malware analysis report

Static analysis result for SHA-256 be67ed21a7899f94…

MALICIOUS

PDF

90.4 KB Created: 2021-07-18 00:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: dd86b4a5231179b0d8056dde06a72dc4 SHA-1: ff3abce6c89f7a9fc62c6225446a65ea4489d3ff SHA-256: be67ed21a7899f943c7609c2de942cd0d89cb16067695859fa5234a98b076c8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the link farm suggest an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/da0f37e35aaa6ab36a68c65e7dcbec66/powekikifizos.pdf In PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ff301cf69---wozabubovirulapagorotowul.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a0ebad154---gasepa.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a487d4c67be---zanivogekipiduzobok.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607055068c3a1---takata.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/e60401dcf54b746deb5b3bf80fcfa30c/90329147753.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/vepadonatesupolagivo.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/av4vpnibsv6gmqsq1hv449uu82/kokipikuravugekogazowu.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/atr41k2dhugl64ivvtfgmebad1/fipodutofarid.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/zekipuxutifavera.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///72708294288.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608676185fdd5---38329212100.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608673862f2ca---80701898914.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/tacjpd5vd6bvstjc5urc6sl931/vejexaxotonopupivubete.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/3b2a67a405cef55fd5c482e65b80f7d2/72052040320.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160887a334aa1b---65917495486.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/89486447530.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/89624198082.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/2nhj0cik48k7s3c81jjnu0mpfe/pepuzutozuvavinenibew.pdfIn PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/80006620673.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/20508575228.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/mesefizukuberagu.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21e1cc8d70---teradi.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/tipexege.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/59df6cecf0631c284a201b545048cac4/78034758698.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=best+cinematography+films+of+all+timePDF 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_off0000fb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6E 17740 bytes
SHA-256: c137751d666af060611cb16096547e65975717af10341ee523eb72605c305577
font_01_sfnt_off00012a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A26 11092 bytes
SHA-256: bdb3b20dd31daf70630e1581b9a3e3622fdde9f67f157271c6e5fa5dcb5be7ef
font_02_sfnt_off000143db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1