Malicious PDF — malware analysis report

Static analysis result for SHA-256 5710798848ea1a4a…

MALICIOUS

PDF

80.0 KB Created: 2021-09-01 06:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2d4741f9fe3d758826118e87c44d9fa1 SHA-1: 2d5e2f0212e3176aaf1b4c538eaac7095fdf63d8 SHA-256: 5710798848ea1a4a6ac8a21a84a260ff2cea41aac4e39ec26c46ff058f3e8fd9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or are part of link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond its structure as a PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • 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.
  • 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://vyaspublicschool.com/ckfinder/userfiles/files/30690295409.pdf In PDF document text
    • https://tonitomov.com/picture/file/sofuzamiposiwese.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/37521092670.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/vuziloniposoliraramodexu.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/zejipesuvopuzavano.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/09828533db4137d29ccbadc409d7a623/7320772418.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de610ebd64---regedimajepiwugiladovo.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/fukusun.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/zokebokoxafuxelizi.pdfIn PDF document text
    • https://vozilasavozacem.rs//files/fukoninageruzuvinuvuv.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/favepaletaku.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3e314a5c4---rokozibubawamewi.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/ea50413280d11c92604bd1600655f278/fopevapidikerolefopojux.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/6c6a116e1f8502c3d1d43d3b9a35fc96/43615940583.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/disurej.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/vatakafajujeris.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/53fc0fcbebca038d1040f0b645e5a16f/81748336821.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/23388001854.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/65498776869.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085e1206071d---15183020609.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/96186126253.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac58472b458---vonolomomonetarenob.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160727f5935b6c---pidarovuzoxexeganu.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/7644607716.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=pdf+to+word+converter+free+download+filehippoPDF 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_off0000d4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBD 10704 bytes
SHA-256: a0e25a75b5360854f38b8bed140569f54ae62e827ade71d4cd6dc7321c42e71d
font_02_sfnt_off00010544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10544 16984 bytes
SHA-256: f5e8bf87aa0fe9635a97e69b308ba56fc28bed99dcf8a5469db53579f04f501e

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