Malicious PDF — malware analysis report

Static analysis result for SHA-256 a01032f94330fcfa…

MALICIOUS

PDF

88.8 KB Created: 2021-07-05 14:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 72ccc02452e55f4c11c0c836b80bacd3 SHA-1: 1b7a37bee3aec12f91c04bb6eea76fbbf6b00888 SHA-256: a01032f94330fcfab52af9a32ee858cb074ed51add7913235c9bec4b0071e1a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of external URIs and compromised host links points to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/7a67caf1132e3448c46578b1e38e5549/vizaladuworobuke.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160853062b4583---xexidetafabuxomexenova.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a6247b94d---75755456127.pdf
    • http://kagoshimakojintaxi.com/userfiles/file/palijubimiwetilafuzekover.pdf
    • https://dodatnojamstvo.com/userfiles/file/vapunumonobodazulogitove.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/1iaa94hm8sd597ok217nuv5kju/24635564054.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f59b75ff54---38513775795.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/ae804c2d06e8b15997fd06790f671301/paxezuropuzazup.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/0cc02aabd5ca15a33e4e0d554d64c88e/kavajumelikodumifukedulag.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c63b11252f---42111915691.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/nul5pbn96mhlvui9p6ajkljeb1/difagupawemovatixanitom.pdf
    • http://gayaarchi.com/userfiles/file/20210603221122.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/7ao86k6rj1dm2lm351cuoq55ng/zakawe.pdf
    • https://cape-electronics.com/media/file/40820435301.pdf
    • http://bebelino.ru/userfiles/file/nosinewiwojezin.pdf
    • http://ildungrice.com/fileupload/fckeditor/file/malareturiwujefu.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/20f17685e1c82b5d96c24108288b2d0e/60601420376.pdf
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/81156397804.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a15b63c35---nudakidisamofuzo.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9aeb1ee9b1---30285988962.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/6c0d474801fd19c9fcfc2cfcdd065e51/rifakitudotovebar.pdf
    • http://greenbiotech.vn/uploads/userfiles/file/nobele.pdf
    • http://speaklifeiamgreatness.com/files/files/78955516761.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=subunits+that+compose+both+dna+and+rna
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f396.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF396 16792 bytes
font_01_sfnt_off00010ba8.bin
4e6f714ef1e8936f084e768cb5485c48a60ca584d16c916eb1dbfa5e6da1b8d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA8 19012 bytes
font_02_sfnt_off00013c7a.bin
b8105a4251aeaba580984afc6a22558fa465ce814ce136c0228ba539b157bcba
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7A 11048 bytes