Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad6c4ceb0df1008…

MALICIOUS

PDF

87.5 KB Created: 2021-09-06 17:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 60b11331cdec95ed175c982bbe1fb26d SHA-1: 887869096c2eec654e782e1b24ec863acdcda4fa SHA-256: bad6c4ceb0df10086ae35c4bec50a6cae554df851934f4885c1c338771e8ff42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URI heuristics and link farm detections further supports this, suggesting the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=o+que+%C3%A9+empoderamento+livro+pdf PDF link annotation
    • http://solamsys.com/userData/board/file/57246742315.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087192236088---mefenasubobogemolejuxu.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/femewawebo.pdfIn PDF document text
    • http://mlead.net/images/e/file/siwujidamo.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/34ae2886797685dbeb3db092b666a733/96664561857.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/89195698357.pdfIn PDF document text
    • http://cathugo-catamarans.de/res/wysiwyg/file/dewapemakil.pdfIn PDF document text
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/xowodojasagedagatusane.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/47337135515.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160fe1802437ed---zojelip.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708cc5a7e98---69292854721.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/4n73se3s5rikeam2a8cf8652s7/tasoxof.pdfIn PDF document text
    • http://stasta.com/userfiles/file/94976607069.pdfIn PDF document text
    • http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/98161014334.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/63ed5b493e459b1fa6e6b668aa936844/8671476858.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/33376219081.pdfIn PDF document text
    • https://nexusmediation.nl/files/90592562189.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/repasoladulinelak.pdfIn PDF document text
    • http://allasclub.com/campannas/file/woxoxuniga.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/12421267242.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084db4588929---85690539527.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_off0000eb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB04 20468 bytes
SHA-256: c0b47b9153819712a5eb2529dd78c4b5a844e69b7479ac8025594c34bfc32ae0
font_01_sfnt_off00011dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAD 10980 bytes
SHA-256: 6a3d12d5be21fa4cf886d58bfdc5ae7785cafa52358c14ce7a41d76167a596ce
font_02_sfnt_off0001369a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1369A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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