Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f5dcfad44ad121…

MALICIOUS

PDF

90.2 KB Created: 2021-09-03 20:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5ebf58a17e850dea10efaf8da6d125f2 SHA-1: dc31b04c796abd9aff04a62b53f55744d720bc30 SHA-256: 10f5dcfad44ad1210c4b0c38cd3c9b9cd53f4553af059e27f388d9fc611db646
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://curry-box-deluxe.de/userfiles/file/sexedijere.pdf In PDF document text
    • https://rzfmuhasebe.com/userfiles/file/43034623068.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/16ad40144d7354156d017002d782e079/69904817176.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/tiramare.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d7f4ad257---widora.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/biwefemipuwuzekoz.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/dofusotowakuxazaliwikas.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/dutofif.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/menekefene.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607b29264a7d0---73470791418.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/netax.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e4e4bc671---60960312290.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/bfce06eea36f64efb00730e8c6a7d268/71347373101.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608d19f33a9e8---19497344746.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/49742835159.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/4v1itd01lcnll4qj72vlusfrm0/94651410892.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/99125011452.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/sidanefuf.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vanedutesane.pdfIn PDF document text
    • https://parfumzone.ro/files/file/99413702992.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/xarofuk.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/28696036954.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/90elu217r7dhtase000eng20bo/45449594988.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/89814950038.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=kinematics+pdf+class+11PDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/geretejemiwizajozukipu.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_off0000f629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF629 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E40 10604 bytes
SHA-256: 05c2d5ee428e4784ec73dffd4e863c8756b66bc9a94b97d674f0fd97b94b7154
font_02_sfnt_off00012680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12680 20092 bytes
SHA-256: f376d7571dc009856c834d2b0b45d9dd918955c2a0cb06ec5d666dbaebfa15f8

Open this report in the interactive analyzer, or submit your own file for analysis.