Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade1adc70abba97e…

MALICIOUS

PDF

78.1 KB Created: 2021-08-31 22:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17dc8206664b626abae54f3df73f0e57 SHA-1: dfd67bb30e86797d058b4947ba69678b66ac7f0f SHA-256: ade1adc70abba97e62f91e0dfefbe80e72ef5148a103eff3d2207afc76d8f77c
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS upload directories, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms points towards a tactic of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9084

Heuristics 5

  • 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
  • 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://energooptima.hu/upload/File/98281399935.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/uf8vlv5agj4l4eqiqn8q2f3us9/9286772774.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e27b705e98---gofote.pdf
    • https://samavetah.com/ckfinder/userfiles/files/64308829334.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786a873af9d---gudukuxejejemewe.pdf
    • http://loscogliodifavignana.it/userfiles/files/11150802497.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098dcad1438d---1175482825.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/b32763d65e2ce0d57a9175c7691b56ae/bumazizagabexi.pdf
    • http://thetsaban3watnuea.com/UserFiles/file/gotugigejowobopuxivumafuk.pdf
    • http://n-production.com/upload/fckeditor/file/pifuxidovukesikamusate.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b6200cc8504---95734863826.pdf
    • http://anthonyvienna.com/sites/default/files/file/dojunagitorokoni.pdf
    • http://giftboxvietthuy.com/upload/ck/files/44020374748.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afa41d7771f---81173887879.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16080972826b08---feguxomix.pdf
    • http://wingmanplanningdemo.com/userfiles/files/73506966540.pdf
    • http://centralcogtc.com/uploads/file/naxap.pdf
    • http://daindnc.com/fckeditor/userfiles/file/matalu.pdf
    • http://arunimaflavours.com/userfiles/file/binizetedoxi.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c329ba1718d---luvigidagegakaginabiwixe.pdf
    • https://whiteplacard.com/UserFiles/file/bogubezinobus.pdf
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/lelugevisujifatejezu.pdf
    • http://writtenmail.com/upload_images/file/felivojive.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609821f0f28f5---16811223241.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=belle+from+beauty+and+the+beast+coloring+pages
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe08.bin
dc0477f6ac0f92238a7ee2b9affc59330dafc6b5e0fd7f9c490805b006bde570		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE08 18496 bytes

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