Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b192b3f8e4722fe…

MALICIOUS

PDF

88.7 KB Created: 2021-08-18 20:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3dde855e6f9d427dcc407c1af60bcbbc SHA-1: e6d067e7607c6e44f6502bad39acf17452190c4d SHA-256: 0b192b3f8e4722fecacc52928c71ee46fd7b8b6b212084c939b5f5df8cf4970d
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. No scripts were extracted, but the structure and URL analysis suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2702ae65a---24125290321.pdf In PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/fbd747040ffa6aabf30e848a892161bc/11075597556.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/dovonagobobuka.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c011c3b6e---4603805993.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/gewuviwa.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/sudatalisas.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f808ba1506---74884888822.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f38f608be3---99752742267.pdfIn PDF document text
    • http://kanomax-nsk.ru/images/55600321905.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1620895757.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/6d0afc56f0be95b17679227525fe7421/ximuribewosizuladubes.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/18217283557.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/7779757215f111a10a9d5851f015f0fd/larubagowik.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/90258789006.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/219a4072007e6e0e82104804a8bae42c/pizutiguvapufukin.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/24106850997.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c133b01bd1d---81299162221.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/17016841744.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075dcc8a5de8---jizevetoba.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/dugov.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8b45e314b---25721305908.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160706b7dd61ee---3422882249.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/55170735834.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/66fdae201262c52cf861a3ce3f481e08/jetarorunaganirugulukuja.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/31958378759.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=ib+math+analysis+and+approaches+hl+textbook+pdf+freePDF 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_off0000f30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 11284 bytes
SHA-256: 847f6843ed9f11726d1700e41ee8b6a24c1df80f8ba43932f554f2b60f30be70
font_01_sfnt_off00010d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001253d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253D 18176 bytes
SHA-256: 454ab930addf9c8659df8bc829a825257536ed2e2aada6ba3944c32355b3c2d3