Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabd06d62ef33e11…

MALICIOUS

PDF

69.2 KB Created: 2021-09-26 15:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dbd94aa43ca090832d3f64b8f95d2435 SHA-1: 44a76927f2f92d310fa44ebde50767ec13ace337 SHA-256: fabd06d62ef33e11de29b4f551220dfbe28441c9e483cff36d75ecc56195508d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that form a link farm, directing users to potentially malicious websites. Heuristics indicate these links are hosted on compromised CMS uploads and disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://nomylo.ru/uplcv?utm_term=kamali+from+naducauvery+full+movie PDF link annotation
    • http://yjccnc.com/upload/files/93917906353.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/mamijupigosobuvasinevin.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/78160048906.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1631036014.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614e2119a242d---piruwo.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614215950c990---boteboparo.pdfIn PDF document text
    • http://manegedebuitenwijck.nl/uploads/file/winegixuz.pdfIn PDF document text
    • https://goldgreiner.de/userfiles/file/89943837943.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/91338243668.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/10843479603.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/95848627302.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/o9eb1a2gkbfbntk6f75v9as2de/78395715528.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/26940954057.pdfIn PDF document text
    • https://hsse.hssanesteban.cl/files/31714650762.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/lolabe.pdfIn PDF document text
    • http://kaitianjinghua.cn/admin/userfiles/file/202109130355075134.pdfIn PDF document text
    • https://flomogroup.com/upload/files/sotozinekajuse.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f7c75fbcc---duwepagopebinawogevaxef.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/a461e6d49c6203e4e958b902f06e9d64/21819978477.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/jubegu.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/80486042770.pdfIn PDF document text
    • http://doxetrilinh.com/media/ftp/file/karoteduzowifumeg.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202109252358491391.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_off0000b1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D8 14712 bytes
SHA-256: 5d2cf470ece72c55ce92abb996271694548397975a70e6d4a1ef6d4b393a29fd
font_01_sfnt_off0000d66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66A 10640 bytes
SHA-256: 1786247da7e4deeee7d2e50815fdfae0383e0d40ba7b52d9e335831603433a50
font_02_sfnt_off0000eeb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1