Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0367d88c55e465…

MALICIOUS

PDF

95.4 KB Created: 2021-08-09 19:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 02b3504455f145eb037cd17669add24f SHA-1: 52515d00765e416bef21ad4f89e1bfb7812d4fb5 SHA-256: 6c0367d88c55e465c65e7d7752cd4e5ed4e54e0493f748266a3b6d2daccc09c5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/ed2066c15cfb3fb36ce89d81abfc785a/55196421902.pdf In PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087b684eba44---gezenuzidobebulazemowu.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/92722151605.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/8f1600c2d88f4c3b8f902f8ddd8f066d/simubexixinafaporejo.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/ziniwudaroben.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/i3qlh8ua2fh7g3be7limi7etb2/xalujapok.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/81724852820.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5feff21a9---sarup.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/nofugirotinusabuto.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/bajexawadik.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/dufowujazokeduzuvesofemuw.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/9rfos53mpnoufc0675tp99rrjp/83184873309.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/99680f329c498fa6e4db26c5f372562c/71704215128.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d16ad5c2bd---37117717543.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/uggt1f3icgngnhhvl9p961mph1/vikofawekorojevore.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/5aa865dfbeb9026668e8d4caf0526420/94825047618.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160c7554bbb7bf---pawazirisakuxolopitenopa.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/97799344287.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/84341dhlo9jhckdfvgdf4kckgu/binanolabo.pdfIn PDF document text
    • http://shiksha24.com/userfiles/files/xiduwaxamekugaroxol.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609062127bfb4---79540741345.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/jemivapiduwoton.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/94a1d63872ba345ecf3fcd4e3d91a48d/38846117309.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=a5+book+cover+template+wordPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/48063405949.pdfIn PDF document text
    • 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_off00011069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001287b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287B 16952 bytes
SHA-256: 1c03bb6b8ef24ea9070c1e374a3452e324d29330b56b11ec4d36c9539a68f6a8
font_02_sfnt_off000154ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154AC 10812 bytes
SHA-256: 744cc73849921d57c687b4c462caac0b0f8ef0bef0098ebfe0b54d2740fe0d03

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