Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e96af44b9a3450d…

MALICIOUS

PDF

83.9 KB Created: 2021-08-22 02:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: edb6c3d6d04dccacdf8f04afec99c503 SHA-1: c892eedb7545b816f0a0640a1b1ef698310bb4da SHA-256: 6e96af44b9a3450d8a5a5c97e114ac013813b5173d7a9ac7dd0803eff2457416
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains numerous embedded URLs that point to various websites, including those hosted on compromised CMS platforms and disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure suggests it's designed to act as a link farm, obscuring the ultimate destination of the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=is+flaxseed+gel+good+for+your+hair PDF link annotation
    • http://septumdent.com/img/userfiles/files/wakibajize.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/bb8022ef39c1ed58a37b472ecba7ddff/26182927587.pdfIn PDF document text
    • https://qualityroofinnandsuites.com/nbloom/fckuploads/file/772425518.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c13b2a4a04---fetonijadorisenadakelonow.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba01ae1a036---34479249141.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160744f891ccbf---85996736332.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/potugiwujixepixuzore.pdfIn PDF document text
    • http://prolocolidodisavio.org/ckfinder/userfiles/files/pozekenapavawufakifotez.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021051623090373499.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/bf31b583012fd466773c24f86d4f3320/zupot.pdfIn PDF document text
    • http://xn--kprq5pvqklteonubj6c.tw/CKEdit/upload/files/7354172567.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/m870er9hsjl3ha3cc56ghlimb3/lanomosesoxumigurixemo.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/67065439096.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/62305372278.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/ll7t4q84jfgt82gb74tkmbthgd/jamazidug.pdfIn PDF document text
    • http://yuha.be/_files/file/kosud.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/vawupomuwasomitozakili.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0a8316bb4---rokovazag.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160addb3dbebc5---fukiximaxa.pdfIn PDF document text
    • http://yyfxsw.com/upload/files/lusawamawaxunuj.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/36251836412.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/294bd75c441e92ee502f32c134d6e64b/17333903422.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_off0000e208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE208 10696 bytes
SHA-256: 77ebc5d0273ef7b2101ea9ed543218f8187b986301f3b03e295030847090bef5
font_01_sfnt_off0000fa79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA79 17988 bytes
SHA-256: ebc3c8e4d9da56ec4b67a5357e27b79695523affdabdb7f25ddb73b3fec20445
font_02_sfnt_off0001278d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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