Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0e1cce395609c9…

MALICIOUS

PDF

85.3 KB Created: 2021-09-02 22:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dcf47e591b675942cddebf3cd68dd27a SHA-1: e6d029baaf9cbd2dcaf8cf92048349b5d5c073de SHA-256: 0b0e1cce395609c9b2cea1ca61c0f68726520ac3fdf9f0948ef587fc5f245458
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the structure and URL patterns suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcc144b5d4---14666057293.pdf In PDF document text
    • http://veejaytechnologies.com/userfiles/file/39927596785.pdfIn PDF document text
    • http://0575zl.com/userfiles/file/gosovi.pdfIn PDF document text
    • https://intersat.lv/files/file/vobamatisatozafofusemize.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/junumotirejowukanakede.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/85371767459.pdfIn PDF document text
    • https://oasis-travel.ro/files/kosazozelob.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608372451cc54---70088927076.pdfIn PDF document text
    • http://topupdana.com/contents//files/pufotenexezupanevuf.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/19bb0964b3efd801d7fdcc1472f455a6/losuwiburudiledut.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/jcssa2p17s8i2lj4lv5a1tau55/kimulitevigaxuvi.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/vevisipazisevifugovike.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607890fdb74cb---suzutikelugotoxapugeka.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/518130fd8d3e6e2cc314a2d7cec68f63/44909164267.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/98968948276.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084331501c75---44907638917.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/lukenubajegizobefimijo.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/c83fcf32d8f5ace9f4c6e5f0903814e9/55122169041.pdfIn PDF document text
    • http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/65755298749.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7333a75eb3---78770638296.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/vixip.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/40307396769.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/77767325387.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/rizepudoboz.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f4c46bc2c---wufozawokaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=homefront+electric+blanket+user+manualPDF 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_off0000e7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D4 17912 bytes
SHA-256: 5f034de106dcf08d56576a1b1bb4dedcb0cccc18acadee618078511f879ea790
font_01_sfnt_off00011626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11626 10820 bytes
SHA-256: bf1ff9b0d145994e31e3e181df4f301bfb1fbd15c62f2c5f7f5324206ad2e916
font_02_sfnt_off00012f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1