Malicious PDF — malware analysis report

Static analysis result for SHA-256 69092db34e6e8dd5…

MALICIOUS

PDF

76.5 KB Created: 2021-09-05 01:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: a7b13e01f69b3beeaa880bddf423b175 SHA-1: eb3d06b0edfe9688a690882a9b0762ca7a527048 SHA-256: 69092db34e6e8dd5c98998712fdbeae8e51bbd054061e1db688bbe155ca7a800
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm pointing to multiple domains, some of which are hosted on potentially compromised CMS upload directories, suggesting an attempt to distribute further malicious content or phish users. The presence of embedded URLs and the 'download button' heuristic further support a lure-based attack pattern.

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
  • 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://coonvalleycc.com/userfiles/file/74546756604.pdf In PDF document text
    • http://greenhousehotel.vn/uploads/image/files/94377524461.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/kivinuveko.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/85328601585.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/2607605034.pdfIn PDF document text
    • http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/31058997164.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/f3574f7745e0bcd761430dd0628be5fd/rapujuduxot.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/a69af19ef6b3002930119a7d8ff51be7/kunanegakawalixitodofo.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/8b5i3b4p6v7tandm7nl0vvth59/sonelebakumafiwukanorovug.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/holne07br8m9mqqnolcahbtiq7/76532604634.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/1241993178.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/52633645590.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/zomoze.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/4062064387.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/18070912012.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/sewoteraxanilifiloluva.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706ae4dfe65---riwukutatodipap.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/e91f8110ce5839af66f4dbaec2df155b/kemazirife.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/salifibunidobeloxuto.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/27769517786.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/h06vclhkmm1hb6sdq4drmm8gr6/lijofawibinajuki.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/47661ff767c1b3e6e03849bedc92be4a/42597276055.pdfIn PDF document text
    • http://z500.si/files/79886812832.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/ub31n5scv22gl3c5hu7p7p53ao/73442502151.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/devavigerixoxoverosagoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=bailey+and+love%27s+short+practice+of+surgery+pdf+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_off0000c507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC507 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1E 11352 bytes
SHA-256: 081eb150fe9513fb4f56d8070039f04eb70941172125e37df90972f9b6aee1ea
font_02_sfnt_off0000f7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B8 16360 bytes
SHA-256: 728c5c5f43404d57da6b7f33cd1331210246a455bbbb148626d2c38b8f045379