Malicious PDF — malware analysis report

Static analysis result for SHA-256 33cd76825462a898…

MALICIOUS

PDF

84.7 KB Created: 2021-09-04 00:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 909dfc50f56012af8cdb79ec44e04af8 SHA-1: e59fe9802d36a2f31f556d1bf9db4f3c35c32375 SHA-256: 33cd76825462a8980f7ebd2a089754d4b724b4516044064eba389d9c49091cf1
176 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, including one pointing directly to an IP address, suggesting it's designed to redirect users to potentially harmful content. The presence of multiple compromised CMS upload links further supports the attack pattern of luring users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/e8oor92uresrd37h3q8iphc3qm/27861582966.pdf In PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/dipofugobuzewu.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/gomovipisunewabur.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e0a359d311f---mudebotetuwuriposepek.pdfIn PDF document text
    • http://teknis.it/userfiles/files/43100520794.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/biliwoduvinusasivex.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098f0918e267---zatof.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/tuwivuji.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/27730096211.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2633d23a9---teret.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/vufekarekirubepafaji.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8bc9de93e---51617900733.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/hu1r504poe0fui0di9kjpke8jh/bomizupabug.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/48931611779.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/46015459725.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/53504388448.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/pivagux.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/telur.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/5875168349.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/bofolez.pdfPDF link annotation
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad75c6ca822---dosisaka.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/tikivalefofovukogu.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa0557b68c---xijowefavuwerusev.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/rexomaguvot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=food+appearance+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_off0000e5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BA 10188 bytes
SHA-256: 0279f9905dd80ca13a9096c37f0fc9237da5c6352619192416a2cd4987080290
font_01_sfnt_off0000fc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A6 18564 bytes
SHA-256: 7a024c4a3dbce7bc6e08f39442b0647f76bd8986618b1a8a42a850e0a940f7c6

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