Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f94a07d3aae2849…

MALICIOUS

PDF

84.2 KB Created: 2021-07-21 00:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8c0c014417f112f5058be3620608d291 SHA-1: 06a9670b5578ac9ec2f6692146817bfc21c3dfb4 SHA-256: 0f94a07d3aae2849b6b51118bce443e291aadd23433df4bfd83c53a17c295704
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users to malicious sites. The file also includes numerous links to external PDFs hosted on compromised WordPress sites and other potentially disposable domains, suggesting a link farm or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/03fa7006357ee3b1e896948da750899f/fofokomupof.pdf In PDF document text
    • http://alemotta.com/resources/original/file/62864607092.pdfIn PDF document text
    • https://basisnomor.com/contents//files/58393037064.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/131958257051.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/xexeluguselowibekosaxe.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/cfb32ddd9b67738b4c7dabac9693a706/sepidobetanejuva.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a24c2059d24---18473352609.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9643cd053a---vologuduxofopaz.pdfIn PDF document text
    • http://myphamasia.net/upload/files/86909737565.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/a63e95a5107b4246b1c6002fadeb96fb/kadopefuniboluwiwipam.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/1a600ts68nmcvrjgjd76f4dodc/56801607530.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/43995857418.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/vovubutisafadibepi.pdfIn PDF document text
    • http://bdn10.cz/files/file/bibajalifovimawibamado.pdfIn PDF document text
    • https://codecs.ro/images/file/33343272487.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/38990962411.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/0d003586d73a7541a3519e100038db9c/gukuwu.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/3d1698b7d70244c25835e38a9992a2aa/46366019615.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/puf262p106mjit54nn0br2qtqf/xopibojeleresetonaxa.pdfIn PDF document text
    • https://alshuka.ps/ckfinder/userfiles/files/fefolasozepalakif.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bf136b774ba---45006648803.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/817c0b7a39a45cb254b0f2027a4a193d/28697248919.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/tijodidazawomoguwajivag.pdfIn PDF document text
    • https://szaktel.hu/uploads/file/sokajatazajijisejuxiro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=mounted+memories+taxidermyPDF 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_off0000e385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE385 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9C 10672 bytes
SHA-256: 292e0f49ab42ae648a5d62a2cf495fd2c1961878bb19bff4462513e0a4a5820b
font_02_sfnt_off0001141b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141B 17444 bytes
SHA-256: 879d64ceb3fa2c8cbab0431f76f255a8c1c247ffacc56d0e6ec6d091ac1d0c2d

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