Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3017f8d221686ec…

MALICIOUS

PDF

93.3 KB Created: 2021-06-30 00:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ac44209ccf01dace53a4355ec54def69 SHA-1: bd980caa03e66df6c6de58c47d9661ee4aed4e83 SHA-256: b3017f8d221686ec0ff550beab5898b6ef98602485a79030b3e147b61567a832
164 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, indicating a phishing or trojan threat. It contains numerous external links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://allytemp.ru/uplcv?utm_term=pvz+2+hack+android PDF link annotation
    • https://aimhc.com/userfiles/file/bebozabizijigarelexobex.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607fed9a85c99---69105669965.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31e8618fd3.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098947261932---wilujimuxujesapumo.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609790fde0c06---70108746092.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/43b30e929e6f7214848a14da671b2b01/titilozojerivuwokewudo.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072ad580adb2---55169988642.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/47725747322.pdfIn PDF document text
    • http://usateatop.com/_upload/files/70399131395.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/ah1qr2gd7u6i9n4dkh7p7dj045/xaposokexegefeto.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/34762200d93ac89f7f15e14a3a4d3707/zenulat.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087acff10602---vudaniwugiguniwusapitibu.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/98db7592676982f02930441c41f0e5d8/mofoxosepusulo.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/89a224396977a8a197596935a7b0855b/49632793179.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/pihuhrcun3o9oc3slv3aqu08cq/zewenogum.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/xibejefekibizivafime.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/juboxakilupisifibilonim.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/8cd073e5c6c5a9b8361c745a9739f994/dejerodimani.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987c88d905d---gofidowepavisefavufe.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/fageviwadiz.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/7a6829c2c2e21a6b0c55eff75fa0c1f5/25393418209.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0814864ff9---63596886676.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/8887344665.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f0327a89234213cd61a7b94e6b8cc5a2/75193209018.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/9aebf12a1b98e7bf7717b5b599c20637/49868367262.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xuxubugaluxewiwuk.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/84002721130.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_off00010b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B32 10360 bytes
SHA-256: c2fa859dd2b718afda5f87a8b1d6dbab7ffd443babd8f3548b0ee3c3ca3e7ced
font_01_sfnt_off00012298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12298 17408 bytes
SHA-256: 330c7f364b30db15056e728556dead7784355a950ee67b109ff070c96ee8e961
font_02_sfnt_off00015022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15022 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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