Malicious PDF — malware analysis report

Static analysis result for SHA-256 969daa39cddbf2ba…

MALICIOUS

PDF

81.4 KB Created: 2021-09-03 19:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 606707c31153fa742d6ede41aaf7cfba SHA-1: e6b723644d1f25dd90cf34cb7725976dd53fd2bb SHA-256: 969daa39cddbf2ba9cc332d234dc2655d2f318c4824f12638f17d6cf3888a65d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a phishing or malware distribution lure. ClamAV detection confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://irlanc.ru/uplcv?utm_term=saltanat+e+usmania+pdf+free+download PDF link annotation
    • http://daltan.hu/userfiles/file/dogaf.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/ffc7c631a04f08873df677ef9639c2de/rixuguvoniwotopux.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/e53784a0c81894f1f6295be8fd3acb2d/15321292352.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/97692496871.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/23c142e38b7852b9239da405772117e9/17695392454.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/37459506128.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/sugepowagamuxupabili.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e6cfd531565---24984920668.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/93164478141.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/0ummrvl1ujvl4temdte1ih5p6a/22518306675.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/sgc3hhb5vemt1ifj72arg5l99i/gubeborinizaboveg.pdfIn PDF document text
    • http://indecomavo.pl/inc/22509262352.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c79a4bca20e---78935155905.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/38684955801.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/97855028544.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/98591756342.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfad283d5d---pagalelufaxerobubafowar.pdfIn PDF document text
    • http://erfansari.ir/ckeditor/files/files/34326108945.pdfIn PDF document text
    • http://normel.org/files/upload/file/jixewepaxetuta.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/wofopazitamolob.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/64d44d4322d9f45b1673cf4aea5f3b46/zumevefem.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1a8fa3c65---vibuzinadaxoxusurixedib.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/9603038534.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/wuleru.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/figugovirirezokuxiweba.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e96306185---tawugoxe.pdfIn PDF document text
    • http://technocom.pl/editor/file/wixulowevipikutaku.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_off0000d416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD416 19016 bytes
SHA-256: 3c35a242ce3e2d451b21f6102c0e6884b51707f199a9b9d9c102020e2ed8f69a
font_01_sfnt_off00010648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10648 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5F 10920 bytes
SHA-256: 0ebf45aa76af96272abd08522949bc2e7269d3dfcd62e892b052ab4f989dcf33