Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0e3c0569c5570b…

MALICIOUS

PDF

86.3 KB Created: 2021-06-27 11:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 123bc9c30a6785feffb6aa8d36ec1789 SHA-1: fba8cda57b3687d825b04737f1cf18f63ed9a832 SHA-256: cd0e3c0569c5570b6f322ba3879b671eaaad60c4505eb307566891d4348cb929
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely used to redirect users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/c6bf853303bf843b6681e4df57525c9f/24590803724.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/jibakokutolonopaxe.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd724732573---mexakikerevixowovuzap.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-16/20210516115526907585.pdf
    • http://dent-pro.cz/pic/file/23510343876.pdf
    • http://anaminfo.com/attachfile/file/wowedalin.pdf
    • https://alnahamgroup.com/userfiles/file/dofuzapo.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/rpqbttc3dbisci3hek8g1nkn23/76512834837.pdf
    • http://myshopekerala.com/userfiles/file/58124920500.pdf
    • https://pet-fashion.ro/mm/file/tijav.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160910ea09c928---zanulepafiligivemebawune.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/17f92d9d87a7ae2e96ef05d5272bb3f6/64252894573.pdf
    • http://atthaya.com/file_media/file_image/file/21285239743.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2d9acfa08---27159070670.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec54d67d5a---27680048199.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/be7aef3e821a0cf304e1305c3fe621de/pabunojagesuvokibewoxa.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57e203fe61.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/46f977158dbed1aafcbf9d69f49b9795/rujakupinebenozasetuvi.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609d3dc4cd368---retuwilek.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c64abff3739---78507261467.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/a427692b163a5694f25a2c59ebad6156/zelujivizibu.pdf
    • https://kimtuong.vn/isc/public/files/fckupload/file/91942663494.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071356c67fe2---jegigabegumowepaje.pdf
    • https://iringmalaysia.com/ckfinder/userfiles/files/79974202247.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/93bokgian9bku1dc6oktbbjspn/13381973298.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b218d501e12---83524932129.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=cold+blooded+and+warm+blooded+animals
    • 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_off0000efe2.bin
e5bd52d6714b3c75c15408558758df9486d04e386625af7b870818d365ccce9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE2 16820 bytes
font_01_sfnt_off00011bb2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB2 16792 bytes
font_02_sfnt_off000133c9.bin
9cace468086e30b80bfd1829877bac8b5fef1d75a0f13ba4acacb7f9b9f6d466
pdf-font-stream PDF embedded font (sfnt) at offset 0x133C9 10568 bytes