Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc2d05b71068949…

MALICIOUS

PDF

92.0 KB Created: 2021-08-03 06:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ea83d0fee46f130f07ddbbe8b99fdebb SHA-1: bff5f8d2ca14459c49dfc6bea4cbcda858aed5bb SHA-256: edc2d05b71068949cdd9797912863831e6c014fd954ec1d715f19725e0317e70
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://coonvalleycc.com/userfiles/file/zalenakepuluvezu.pdf In PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608761fc2d6b8---78127829482.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1608a744fb7c01---jonifesotovipobatexu.pdfIn PDF document text
    • http://betonkeritesek.eu/Content/files/77634263763.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/6b3ffac4a2a52ffc9aad08bcf5c6e2fc/gibibukojogefeg.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/94245012018.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/vuberupemebuwub.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/lelenazezogirapozida.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607baafaa0c03---minolimidelib.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/m0aqeeiarjc3kc6fko6tkqonf5/gatudunat.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/65891184437.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/d03975cd5eb0019f9cf813b76f026305/serapelegukipawu.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a383944ce09---tureti.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d391c592e1b---nijot.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d0c770fd6---tezorivupolegetejamiwax.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/lk8kk0ac6ov8t0324gng1g5gst/tonoruxomodak.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6e4a575b9---pisagazejipejazi.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/fimagabifisidetupiwawaxa.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/2394c52005f9952cc7a4bdd56943bfe6/29683549231.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/68453721883.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b04bb10c52---lufodexuwifefin.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/61242332617.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/rotikejuvotidid.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/68903286144.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/65104955770.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/dff59485ca16a939c622acea5c7d2417/xasinob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=bedava+ingilizce+pdf+kitap+indirPDF 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_off0001007d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007D 18720 bytes
SHA-256: edfe65a6c43e535c679fd8864e06c8e0cf88a7f1cfbaef7db0893c19779a54f0
font_01_sfnt_off00012e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E92 10780 bytes
SHA-256: 6d4f967e92998468d3a7ca1ff9386424c39db8a28719aba483ec8d08cac10777
font_02_sfnt_off0001475b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1475B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1