Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda0ce788f9ccab2…

MALICIOUS

PDF

78.2 KB Created: 2021-09-17 05:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5e680a7aeace6a09f0f0272217130899 SHA-1: 68ea65c52daf128ec932ff8fad7f0232dcfb37c4 SHA-256: fda0ce788f9ccab2577ff4fa929ad3a731a3601a54fcd2629193bd42e711c0af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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.
  • 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://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614008bbadd45---savel.pdf In PDF document text
    • http://blessingsngo.in/userfiles/files/10978873323.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/zevamaserusimujutixokip.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/volev.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/pidenamofopuxuz.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/pedovakozepudezidoj.pdfIn PDF document text
    • http://cosyromania.com/media/file/53469345761.pdfIn PDF document text
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jizuzigokobulem.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210905_B6BCB04C1905AABC.pdfIn PDF document text
    • https://ismart99.net/upload/files/41578685007.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161313389dd606---48827455885.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/d5695e88a020c352dc6a372391267ef6/12026193200.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/43194433977.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/54209221977.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/fafikolepepinizewak.pdfIn PDF document text
    • https://tierlistei.ch/downloads/tavone.pdfIn PDF document text
    • http://radiopoint.cz/userfiles/file/voxisutovopedimigalewisef.pdfIn PDF document text
    • https://qkon.ca/images/file/samufuporabidom.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/pazevibuvovupaz.pdfIn PDF document text
    • http://fitviewer.de/files/file/46024508021.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/17173544966.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/92265186087.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+set+animated+wallpaper+windows+7PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#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_off0000d3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE2 17640 bytes
SHA-256: 823bd01759607a089ecc9768c7eeb6248e94b5587224c43bc91718a2c1b9732f
font_02_sfnt_off000119a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A7 10680 bytes
SHA-256: 1d838681d766352449c92bc75b07edb2ec420986658c8e329a71f3353ad15520