Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae2de99d1ed5398…

MALICIOUS

PDF

94.4 KB Created: 2021-06-26 13:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 97d0856032ff6ef096ce8c11c226bfa5 SHA-1: ea6101bdaa11f1f7fbde153848a83b7e4679703c SHA-256: 1ae2de99d1ed539892da9d58844cc24b4b0ec0a84269e42e3305f5318003c1c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to external sites, many of which are hosted on compromised WordPress installations or disposable domains. The embedded URLs are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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=ad+rock+mike+d PDF link annotation
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/047112c33362e100295c1b93e398fa7f/penemubur.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/novujapujariromimemaguj.pdfIn PDF document text
    • http://brlairport.com/images/file/fetumifuzodemedibatovujav.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac22b6e5f46---tevidofododa.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/36459239616.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b87d0f397---31247847440.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61248975949.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/luvevarilikub.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/nuruwisewurutupafivab.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/tapuxifemolututixipu.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/tugokasesoxiwun.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/84934525791.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/d9p5mo4600ggrsqrffruikfo44/luwofanizadebajijejelor.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/59745325823.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072ef2ba88e7---38007868208.pdfIn PDF document text
    • http://mousike.it/img_ins/files/jowubebubovinibaje.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e24f2c18b2---kobobukiponene.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160be61852e620---19776109721.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c01cb983f2f---94856554835.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/79824245599.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/35dd25c302176f8c9eeef0cebc5fd839/nevusatowutodagifog.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/adb1d454fa9102a29ea4e03719b0201c/64619053585.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_off00010cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAB 20016 bytes
SHA-256: b950ae2aef5dbe979bf4c898e470f519b75a7f15acbb7c4961fde93c1320461d
font_01_sfnt_off00013e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001564e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1564E 10024 bytes
SHA-256: 9b234768e4f46fad0b9c4e5078910fe3e264b54df58b256f4e4c3568561c53ee

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