Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70fbc918e472352…

MALICIOUS

PDF

119.9 KB Created: 2021-06-28 00:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce84ede6015aab29770440d46025beb7 SHA-1: 7bf437d1f839601dc27c3012232853f841df7d85 SHA-256: b70fbc918e472352c7c73fa963f3ba48b13d1b423310a85a93239120bec2b6a4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. The presence of numerous external URIs and link farms indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9690

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://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/b9cd166445e68de9f0ef9d528d8dd6c0/dasenogefimivapi.pdf
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/22294976857.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607683e9926ac---34099013978.pdf
    • https://alatheir.com/atheirwsfiles/file/48127392191.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16084a3b2b7272---vigisonukikoviwe.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7ea15913c---wevikanoborojesu.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160799f7f1fcb4---67680307633.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/8bb23ee5fc7d61c72caf55f7cca371c2/807195618.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/5d9246b8ecb7a42deec8f9ce94f7773d/tokerugerukamagolu.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a758d894b64---72189652545.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16079bc181c6a2---ziraperojitak.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/8e01080733128af9c61175bf99a69917/60475964490.pdf
    • https://burkina-businessschool.com/business_school/uploads/file/45553264296.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608f995e46b8c---4176956778.pdf
    • http://mid-europe-ex.com/images/blog//file/49304787140.pdf
    • http://dogable.de/userfiles/file/runikujopibagixepadinofu.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160989ec8cb686---wewuj.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24818a0292---niten.pdf
    • http://grawerlik.pl/userfiles/file/fumofenapuker.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/808d4b7ed5903020c617895b35070e16/14184464190.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/6a39eefc47313c26b50df1cb58a29bae/2442694162.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072803a7e231---88724568191.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2d79578e7a42319d237d53033395f6a9/65515147275.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=why+the+hell+are+you+here+teacher+anime
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111a2.bin
8d080e4046449a2509508763d38d932774225f9fde794448e8d9242b5160e945		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111A2 10536 bytes
font_01_sfnt_off00012974.bin
69af1ab57c22ad62198b117b8bf3787c58b122c7739deeb9335686ac16e9fed8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12974 17800 bytes
font_02_sfnt_off00015800.bin
bf3ac2bbc5511ca59b022801f68684aa2b8ae7661b1a55c6866fed5ae8d27d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15800 16232 bytes
font_03_sfnt_off00016de2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16DE2 16792 bytes
font_04_sfnt_off000185f0.bin
711fba81683202c4ee99f21c0a133721e9f26e6d1170ae5d74ee38a93c7c7f33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x185F0 25400 bytes

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