Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fb61bee5c6691f…

MALICIOUS

PDF

79.3 KB Created: 2021-09-08 08:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c8f5058c0a967df75f0134d01acfe124 SHA-1: 9a63f25f0852605216e527b1cc18b811cd1e4a33 SHA-256: 49fb61bee5c6691fa410384970cc439ec82889750f4d224f8bab671cd82324b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://allytemp.ru/uplcv?utm_term=insanity+fit+test+pdf+download PDF link annotation
    • http://provia-events.de/pics/fotos/1/file/8765731051.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/61230253235.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/kiwivevu.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/laguruxibemudokigoxajot.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/19239467590.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/92282359279.pdfIn PDF document text
    • http://sarljarry.com/userfiles/file/tuponelegamebiwuxojomunu.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607d12c762a91---55244725819.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/39d99db1adccd7bd7115375569b30492/8772496418.pdfIn PDF document text
    • http://scan3dsaigon.com/upload/files/91038229057.pdfIn PDF document text
    • http://orhs89reunion.com/clients/77823/File/godovevasebawup.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc3e3d5a02---28921399215.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b19aedd7fcd---nufivokodumetixigoji.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/gukavizojosutakejamanewa.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/korosikepidepab.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102e254972da---kelerixobesekel.pdfIn PDF document text
    • https://www.lucaslobker.com/minor/ckfinder/userfiles/files/60290823576.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/84317131169.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/xizulu.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/71897177564.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/nafujosesoso.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd50aade79---fimojobuligejin.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/612a39dcc1bd705890c0e5471477b75a/romidesiwutuvus.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_off0000d150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD150 10544 bytes
SHA-256: d4db87ef9beaf5b343b5be78ee5ec88a3d384a3463d9b71ca3c79779ba537bb3
font_01_sfnt_off0000e985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE985 17680 bytes
SHA-256: 13aab8b65328209ca44d2406f77b90332c73903340fabbb968187cf421c488f9
font_02_sfnt_off0001177d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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