Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a2613d12811b14…

MALICIOUS

PDF

88.6 KB Created: 2021-09-13 13:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b02b782e8b2020fcaeec5ff1344ab958 SHA-1: 14b848c5dae570cbb193de77b6ca996bfaea7d98 SHA-256: 68a2613d12811b149fbc24faab17d608936cd7f346dd5cd1990e0fb628a4aa05
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://alebusph.centralcms.cloud/galeria/files/fibunijabefivem.pdf In PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcc877c571---gazivasojuxelab.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/43226586589.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab1d6f28e1---59067310061.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/67574062668.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99408752492.pdfIn PDF document text
    • http://csp.hu/editor_up/61937617770.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/werovopezusevobero.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/peniretigumokebazifazugi.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/jabebab.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/161327f841a929---70185766699.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/fc608c3982576d77283a8b577d6d83c8/21208258528.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/beguvogevelewev.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/90380298747.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/16236944206.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161366b4181c4b---7309540552.pdfIn PDF document text
    • http://standdominica.org/files/files/21917909028.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/44191626231.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/95504693283.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab0a346d86---8468742922.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/vapotivoxilew.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382909082c1---28867815210.pdfIn PDF document text
    • https://gentrilieu.vn/userfiles/file/26409728476.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/51571649250.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=ai+games+for+androidPDF 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_off0000f6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D8 10536 bytes
SHA-256: 049fa848d75f4c8cdabd2911d2dcade15406c5aa67f4b7442cbcf27583ec2f66
font_01_sfnt_off00010e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9B 17812 bytes
SHA-256: f462e9bf0d313e669217c6323dd661c99f511b8bfdb79eabca2c7f1d9cb91a48
font_02_sfnt_off00013c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1