Malicious PDF — malware analysis report

Static analysis result for SHA-256 f835e3e0a8b0f8a2…

MALICIOUS

PDF

69.3 KB Created: 2021-09-02 18:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6107c1cc7ce38f31414295e072372693 SHA-1: f7352e0c329b2b07ee7b5b61413aabbe9ed4e1ee SHA-256: f835e3e0a8b0f8a237ed5ca3e3b44eb5888c05b61c4516c896baba778a2c5f8e
124 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple compromised websites, many of which are WordPress installations. ClamAV detected this file as a phishing trojan, indicating its malicious intent to lure users to malicious content. The embedded URLs are designed to host further malicious documents or payloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/45ff5dd4bc8296c1a31fc13553f02204/34093285167.pdf In PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/kisujojowedi.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/21158918562.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/679264596609af61027801.pdfIn PDF document text
    • http://rexant.by/upload/editor/files/nufumitapiruletov.pdfIn PDF document text
    • https://ptogel2.com/contents//files/vilozikasive.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/88674898526.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160982b48bd4ff---tozufixowene.pdfIn PDF document text
    • http://blackwingsexpress.com/upload/userfiles/files/livoru.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/lasaludofilibazise.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/6443acee1e5f1a0d362c9b9bfd41e81c/dewozemamasufap.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/tenadeba.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/zoririwufaxenetekisasadex.pdfIn PDF document text
    • http://kozhencherrymtc.org/userfiles/file/matewumotutelabuxupene.pdfIn PDF document text
    • http://fundacionecla.org/resources/original/file/52640904763.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/jekibajapigerisitene.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1612364a00dc28---virurerurodubowokojogif.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/80429363730.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210603034123.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/zekina.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3998ae4e4---bijivezema.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160917cbe9cc73---51647986538.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/jeguzajer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=aramco+logo+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_off0000c0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD904 10348 bytes
SHA-256: 1ae9275a2683dd6c6f56cc539c397a198f2342b268c5c203fd049f7feac5bbe8
font_02_sfnt_off0000f02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02B 15796 bytes
SHA-256: bce739440a2aacb3f30a506d9485561e07485321fe758e638fd95e6b46ea3497

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