Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0e89c4ec394639…

MALICIOUS

PDF

85.3 KB Created: 2021-09-05 00:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5a7e2eeaa8e2578bff997c469ccbdd13 SHA-1: 60a7695838c6b49d52d142c3e8ef4b11c3aa5ef0 SHA-256: 6c0e89c4ec3946396cb64725dcf9f0f1b97eff69651515a63a4964ff3684ca62
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.hgbehringer.de/img/files/files/risazuluwubewegisodogo.pdf In PDF document text
    • http://soc-in.com/data/media/files/libibiralajelowivolevari.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/0acbd17ebee2f8a97369ac92a185fba3/saguvod.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/286562009.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/77519637498.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/79435bf483fef7c4ee59d89e89b07e38/34062675329.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cf74db70c---rapoju.pdfIn PDF document text
    • http://jaatkinson.com/userimages/56420536124.pdfIn PDF document text
    • http://3q1p.com/upload/file/210619220928986377h7jyh1sr3lxi.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820ed37f214---10944833944.pdfIn PDF document text
    • http://ithaca1961.com/clients/875375/File/63219284332.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607befd0e7626---62491893720.pdfIn PDF document text
    • https://actorconseil.com/files/file/82280870682.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/6568448118.pdfIn PDF document text
    • http://groupkaishan.com/d/files/53830982626.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/faponamade.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7cf9e7a35d---44949850532.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/xivadavukivanoreterabo.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c204fcd8e94---reduzagimut.pdfIn PDF document text
    • https://edebmachine.com/images/media/files/takupagejege.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/24hlrf34qi8i7futdjhip9kj36/8940173609.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/n7urd9ci903paj9g77uhos1bds/65892291412.pdfIn PDF document text
    • http://jaika.in/images/documents/files/tulejaludenakes.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/jijunozit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=autodesk+autocad+2015+tutorial+pdfPDF 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_off0000e8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DD 16972 bytes
SHA-256: e5528bdaa34184212d332a8bcf524bc71abbcab032dfcb85b6c69c52a194d0ee
font_02_sfnt_off00012ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE2 11108 bytes
SHA-256: 40a22b3bc756f93c4f73da8596eb646b11c7df85d44dce42735d67eaa30ae225