Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fbd1e02a3186b7…

MALICIOUS

PDF

80.3 KB Created: 2021-09-06 17:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ed286b9c617f194fbc986ec4f813cc8d SHA-1: 88dffe3bd5f62e1d6daed7ad54a7d7585c339cf9 SHA-256: 69fbd1e02a3186b754256b97a897148b5073531d6c2684e0c9934053c219e8d6
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised or disposable hosting, suggesting a link farm designed for SEO poisoning or phishing. The presence of JavaScript indicates potential for further exploitation or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://pokeocncafe.com/uploads/files/99233016723.pdf In PDF document text
    • http://miraesusan.com/ckupload/files/74129583475.pdfIn PDF document text
    • http://rebeccaosborne.com/uploads/falenadema.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/girusitupoputafodoro.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/33294947947.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/52877711507.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/106361855160ad9fa74c868.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/wawutadoganogiw.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f0aa427f8---95057926350.pdfIn PDF document text
    • https://linkevicius.com/upload/galery/file/90257214097.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3cs3moetf3r34prln8gvtmmk14/38558324604.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/os31l2aj9opj182mt7a6tpu2oa/fuxuxosufideg.pdfIn PDF document text
    • https://netlandschool.cl/files/46578929149.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/94e2769481bfe04ad4b7f50234d5ec22/gobudezirajitixebototat.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/78996997650.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/88912633949.pdfIn PDF document text
    • http://perksys.com/userfiles/file/nazogakowexunafake.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/sugozerekudupegil.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/dnremnod8231jfh1lig44cg8kt/tagawununoxujonazem.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/91238797902.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/gogogajovelinos.pdfIn PDF document text
    • https://proxus.nl/file/61167990274.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/dabegezejulera.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/xufakefurinetaxede.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/b2e03b1e0acfe0048dc1cd0e9ad4a4e4/29938797722.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/30424028531.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=autocad+handbook+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_off0000d376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD376 18568 bytes
SHA-256: 47f34fd744a5cba7070d02de3b274929780909de30479ebbfd202210d1d54f2b
font_01_sfnt_off000103a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A7 10492 bytes
SHA-256: 65d40c5eb4633ae45954ca88534de77dd57f8b5cef0983ce604485dba71776ff
font_02_sfnt_off00011b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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