Malicious PDF — malware analysis report

Static analysis result for SHA-256 323a92fe6ea6e85f…

MALICIOUS

PDF

69.1 KB Created: 2021-08-17 10:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 30d455e69bb4a4779b06326bce6f9f24 SHA-1: 3a7f78198dff5f62916a400c5a6e26997e8c369a SHA-256: 323a92fe6ea6e85f2fa431fb99da6612dcf859d688f0c38f265747f8426be3c0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document identified by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely lead to further malicious content or phishing pages, indicating a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4056

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://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088baf28ebac---85881497448.pdf In PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/861f634c24e42989ccb7ef836a1b2392/wujizuniz.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160790d24428af---867534697.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/280924518184.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///39474845571.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/5ca450d54b3e0613419a854b25fa3819/68016957182.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bb6598ce5---fovirajemuka.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/mexilozikasoniwazopafiko.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cd2fa51aa---wodepo.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/06/21/file/20210621_000641_180.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/64334642082.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a3f5a1fff---kujiredemidag.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/bitaruwiwebikijote.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/kinufimowalezulejubapat.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/9715714246.pdfIn PDF document text
    • http://tochalco.com/uploads/files/sularel.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/54afd776c440e3740c2a73555aba6195/puvef.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/wikigiwetevenoxasefu.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a00005ab735c348049eeade1247e572b/tofetomeviruzevisozafozes.pdfIn PDF document text
    • https://booknowrentalimo.ch/userfiles/files/10137884011.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/5ca6e54ff496fa5a348b40ef29428df8/92580243909.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/34e684da63e8b75ba27df5d7402a8d22/dotamivux.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085afd7db1b8---dutetu.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074f77eda3aa---fogazizef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=benim+hocam+tyt+ayt+geometri+video+ders+notlar%C4%B1+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC64 11348 bytes
SHA-256: ff9ded4aec6d335ad4ff796add28c2798db84c2fbf4e53e5e5c53a263d884c01
font_01_sfnt_off0000d6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC2 17028 bytes
SHA-256: 25a93497e22b17487c1cdafcdbc6a2f42827fe80b1c46c7243aa8032aaf1b55c