Malicious PDF — malware analysis report

Static analysis result for SHA-256 32cdb772baadf3db…

MALICIOUS

PDF

165.5 KB Created: 2021-06-30 03:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e26af07a9f42ca43640ce87416c5e069 SHA-1: 4ef5f64f659f6b26cf025536f0811d8aee58c069 SHA-256: 32cdb772baadf3db3028468262f7a98c6e691e8244cb8c1b2247173ec2c26711
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous external URIs and a link farm structure strongly indicates a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9834

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://creativeindustries.ru/uploads/userfiles/file/nemumiralivelanefijevok.pdf In PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/3ikt1gb8nil5ms41vpdn676rh0/13276010911.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/21028193022.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/38a795a1c8fbda333ae6ef083237e519/newugabuvekefutanuvegabek.pdfIn PDF document text
    • https://landi-bg.com/images/file/31689376862.pdfIn PDF document text
    • http://china-miyaco.com/img/file/202168192424.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc35fa1f3a---30163042535.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210525011700.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/7113363501.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/76860272605.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/lipitizamitaj.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/48233442220.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/81841277498.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/8efb5ae080170537d8902c15fd3a21e3/pijorixomabonunawer.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/xudakexipejoparesuvafoje.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/dbbf21fc74657227f3065efb5014511e/gawazoluwixi.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/14881476166.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/vifitufixizaneribixogozi.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c48713452a---zusidarabumutenetuvud.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16099b477d1197---83732506588.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26f388a402---66079610501.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acb6961e146---63840385075.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=sin+offering+and+burnt+offeringPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000207bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x207BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00021fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21FD0 18648 bytes
SHA-256: d1c51503c1e196c1785956d83d7dd404b467943cc0df40b2c9d68cbf82143196
font_02_sfnt_off00023e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23E54 19916 bytes
SHA-256: 225ad5193bdfa5f4b617ac648651e9d5abeece61bb1320ee6aa272d902ceb3d1
font_03_sfnt_off00026f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26F9D 10628 bytes
SHA-256: 15a843e0ec61a9cd40e2710fb0cfc3b33e87602c0f8b7007e7f6045b3063bf39

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