Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b4e2ae1342b609…

MALICIOUS

PDF

80.5 KB Created: 2021-08-20 21:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d2cd74f6dfaa502d66abb247402e20f9 SHA-1: e73b1b346b247e57e1986a618ac0091bb7c0032d SHA-256: 35b4e2ae1342b609c2e1c74a24ea2aa0da7a65786c0a59143af917d68a39cd8b
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document attempts to trick the user into installing a browser extension or update. Multiple URLs were extracted, some pointing to compromised CMS uploads and link farms, suggesting a phishing or malware distribution attempt. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://aiaciran.org/cache/fck_files/file/worumemojijilupomilidajeb.pdf In PDF document text
    • http://preciz.com/uploads/wysiwyg/files/biwenobis.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/wepol.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16096c519b0c16---mibuvevezelixuka.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/bogowaxewitunabu.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/wazomo.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/porbni2985lemmkhd2rj7vgf8b/xujeropotixevil.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/00958ad92000341903434f3d9dfe7f40/ziwowomiwukexolo.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/31154179317.pdfIn PDF document text
    • http://fedime.org/imagenes/8777748198.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/jukonagezejero.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/tuguwefi.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/vinaf.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/1588019951.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/afdcf034a4172f7b5fa19e41cb7b32e7/xafufopobinoj.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/luveramudumop.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/popavojopidit.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8c47d0441---vitujeto.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/fosata.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56fb2452fe---nabasoxamofinikopuv.pdfIn PDF document text
    • http://rubensova16.cz/files/file/sojeseposif.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160758e0d80907---34975545155.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c245392f7e6---44664186373.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+resize+pdf+file+below+200kb+onlinePDF 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_off0000d82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82B 16412 bytes
SHA-256: 4d0ff2d80fe95dec9be0e593e3e718fb33c2710168c676058d34b60fde8f9b25
font_01_sfnt_off000102ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC2 10940 bytes
SHA-256: bbc1790c42d280f10a4d13e9efa9603ac0035531ff5ddebd74c1d97535a8ae1f

Open this report in the interactive analyzer, or submit your own file for analysis.