Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce589dab9584ba78…

MALICIOUS

PDF

87.3 KB Created: 2021-06-28 04:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: edf0fa6443852a44e38be27145db1665 SHA-1: 62395bf5c6b65cf843357e02f103d50f8ef1639d SHA-256: ce589dab9584ba785d48e0dae48873f26cb22ab4a0f1a61c65d5f093aeec54ec
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the extensive use of external links is the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099acb71d4aa---84745075480.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16074971b72d39---56287277778.pdf
    • https://prosperitas.be/data/assets/file/vifefixaramamobixin.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa7695636d---tixinofatuv.pdf
    • http://akcjonariusz.com/UserFiles/file/jojebiratelanumuma.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/c8c803ef69a1eff984aca410e6a5f01a/javokitotu.pdf
    • https://amd-export.com/site/upload/file/10611969463.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/cf328e9761b4a6f3b672eb446de92c46/jiwitomavolezowawejesu.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/togee74jdrksh5ria8lsjtslsr/44919364775.pdf
    • http://abacusnancy.com/userfiles/file/56022396355.pdf
    • http://intestinalfortitude.org/clients/0/0c/0cf504f131cb0201443a7bd449519f4a/File/10399971101.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160816f9b2f00e---didedalosejibapiw.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/pghmdjd41ie2ltroutpc50f496/94442417629.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/f54b79a449e68e995ff583034bd3d6bc/56545286615.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08def9aaf6---purukibaxowojexesofumiwi.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086e247ca9e8---pukopunufim.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/75297997114.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/76b832699c7995854a4d7f293d54a375/wurudeniporuzov.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/79e2d78e3551669d2a662cd4b47d9ef7/filog.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb04dd6644---makoj.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/03f87b97148395a899d3577ddb664455/78180351797.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/e03848ee95276c2e66b0d13d37981694/siwajuwulosilatep.pdf
    • http://iworking.vn/uploads/files/pawazosajapabog.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754bff4923d---3880438133.pdf
    • https://thefencedocumentary.com/adminfiles/file/bafapikigedasadodeboze.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/dbc9f38f637ec59c4127bc41a75ed1ee/56598732944.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/003e98e6e3a838590be2a60102d0a70a/nakonutezivejudeduvizi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=light+years+to+normal+years
    • 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_off0000f091.bin
510213a1ae536fce2caf200552a0ecdaadf37c8099228589b74e60d38149debf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF091 10628 bytes
font_01_sfnt_off000108b1.bin
5dc22f1709cf0fa4926c6890a9f75a44d80bb5493cd888e12576f74904d98b87
pdf-font-stream PDF embedded font (sfnt) at offset 0x108B1 17768 bytes
font_02_sfnt_off00013774.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13774 16792 bytes