Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc4f68d9b416af2…

MALICIOUS

PDF

100.3 KB Created: 2021-06-27 16:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fa09acdcb6c0fe72f5a8c7582ae6e0be SHA-1: f5316c347d8fcacb9726ef74ffba9f9c48c9ca46 SHA-256: fcc4f68d9b416af2f531d4e3a7a2ca9c9ea411d629c36330ea397dacaf051961
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The document body is unreadable, but the heuristic firings strongly indicate a link farm used for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/6dbb7d98e8db5865100f295d8dfe3ecd/nugukewojagisoxugowoxelig.pdf In PDF document text
    • http://asckhn.com/acskhn/userfiles/file/mikonokudarosami.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/17e9aa611336af928a14789c0e089c17/guwafowajibokemibupax.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607f718ccdeda---32977047858.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe03b88454---subisuvazeruvuwije.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/ebd962c7dbd872be892e0685b742f765/10049901554.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/a03e421ac9e1b027a18f34501a2e3006/43680424976.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/h0h644agnsa3p6qlc5d0fqap30/veviwoxe.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-6-6/20210606113630984486.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/nr5lge2lstun2mogp0ot8qf536/70780159948.pdfIn PDF document text
    • http://diclenakliyat.com/userfiles/file/91403443053.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607734d18b605---jisotoz.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/kavobog.pdfIn PDF document text
    • http://humboldthighclassof79.com/clients/1/19/19f040aad945c40a0acbd79abd3dc6cb/File/48329354104.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/842ffb7113783b63a44ce3da22557273/1494529607.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/giladuvodumove.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085502bd945f---muzesusi.pdfIn PDF document text
    • https://coluer.ir/documents/file/loropinemamuv.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4e4150b41---3252626158.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/bazunizusegigenek.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1609463a16533d---44973180354.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/javug.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac15689ac3b---witagomawusazi.pdfIn PDF document text
    • https://maturana.cl/upload/file/wuketaxuzo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=adele+set+fire+to+the+rain+mp3+free+downloadPDF 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_off00012090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12090 19968 bytes
SHA-256: c43221af15cd2e3504e54c345cba55de992810f36c59b4eafb6615988d96b092
font_01_sfnt_off00015253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15253 11000 bytes
SHA-256: d51a9fb4a9822b3d23afe7a0caa1e8077b0c5b6a9a22ea15fce29021fa8e882f
font_02_sfnt_off00016bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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