Malicious PDF — malware analysis report

Static analysis result for SHA-256 03cc9dda68187f9f…

MALICIOUS

PDF

79.0 KB Created: 2021-07-30 12:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be9333a900a9669bd73c3f0ff7f2d213 SHA-1: eac4378d4d4ef7bd698ab8bac089fe132731a57d SHA-256: 03cc9dda68187f9f8cb9862d2eff75bdd3734c1cb0ac6abcdfb56773259b4777
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm directing users to various websites, some of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of numerous links to potentially compromised sites suggests an attempt to leverage these for hosting malicious content or redirecting users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9026

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 http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160894301f1203---loxubugudupisi.pdf In PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/mba6ru7948camo96iao287ni45/fijudarapeve.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa2c3aa9bb---javexexovitesaxujixasor.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/594375242.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b991c3c2d87---94881062813.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/vododolasunesilek.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/bawewurivovelelubol.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/dinuzezomojoloz.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/86683894804.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/21fd59b0772c37b3a85d05c00f06e5d7/pegoleminenatawerilusiji.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/46q9ig8v9jm8r1i0jvom4pa62q/zunofivofux.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/ff7f26d313fa0047988cb67068d2e5df/vabinofikojewudisaku.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/68936819842.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/fenafifodedisugiw.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/gakevugebetozapa.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/zepapipukorajinovorovofo.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/majivunagujababufigupum.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/revolunukimazubopov.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b86a09d0840---rijadesal.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/tedoguza.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/tupejal.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/hisr204utt0gh33t4ukovqfk1q/fufeweximotedopade.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/25507175758.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/tebolem.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/45904533789.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+use+zoosk+for+freePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C6 17892 bytes
SHA-256: e626e5fd6da5a0b96685fc26bbacbe74987b812c4393a1a799dd8159d20ff8e7
font_01_sfnt_off00012680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12680 10132 bytes
SHA-256: 81fe7765a0724c09c53c5c7267bebc6818ddfa7c3ef54cbcccd0298939390bd2