Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e2522298f5e416…

MALICIOUS

PDF

75.1 KB Created: 2021-09-03 05:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 191c1b5d7ff6d32a395021e883a362d9 SHA-1: ad6d9c50bb054470a6e1f077dd000ba893097a54 SHA-256: b7e2522298f5e416b92f49a40309e5bed758c764cea4156f0471174a9f382554
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

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://smidgel.ru/uplcv?utm_term=sejarah+politik+etis+pdf PDF link annotation
    • http://fosterfreezesantarosa.com/uploads/files/45240633472.pdfIn PDF document text
    • https://henklinders.nl/henklinders/upload/files/nulutesekonotaxijorezax.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/fonabamaf.pdfIn PDF document text
    • http://berbun.com/user_img/file/ranuloxotomipofe.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/96021791997.pdfIn PDF document text
    • http://enewind.com/pliki/file/wivoginuwafenexa.pdfIn PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/gikavodolovezipale.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/petorurotativozivolejiso.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607830084d57d---rasatopato.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/39410402668.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb8f43e6f5---jumutolema.pdfIn PDF document text
    • http://bodemveenweiden.nl/bodem-veenweiden-img/kubukedezutomot.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160761f7ac4863---37043831930.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/53c9c8eed4d6d240d2d9e7c3b49bf2db/lufeku.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/2d0df244d53c203c0e77a45940f5a2fc/ninaxufunimotuxagotav.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/xoxeninaduxolomofi.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/82375941390.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/jexexebeduxoxubal.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/76752535709.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/bdf52a4f645418ce5376d30836edb2d7/12566751303.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/noziwemetil.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/gumurisutaminagonerox.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/51338800962.pdfIn PDF document text
    • https://nusbetaja2.com/contents//files/11274237039.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18A 17048 bytes
SHA-256: 7b5f7289d909a031bc6a2736b22f6c56b3915585461152e7f3078d67c1410ef4
font_01_sfnt_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 10788 bytes
SHA-256: 94430565bdcef23f881bfa62481c6b072653db78d5849ed703f2c1ed1c792f88
font_02_sfnt_off0001069a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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