Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abf619b811026c8…

MALICIOUS

PDF

76.2 KB Created: 2021-09-06 20:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 689bae3aa34256e95177e52dcd98fbe5 SHA-1: 6f0265965c2fefc7c5d7b942dcc549ea8f74043c SHA-256: 0abf619b811026c8049402c26ea034fb4ae0bca82c23e609627ed29ab3887993
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to various domains, some of which are hosted on compromised WordPress sites or appear to be disposable. The primary purpose seems to be directing users to external resources, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7511

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://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/e3d9dc94d780532e39c60e8dba2ec52d/95797897725.pdf In PDF document text
    • https://wegofa.com/userfiles/file/guwozarebawabuketa.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/padepu.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210620175920.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/45276377888.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/tgl84scpf3j0k8ln00r7hfeh40/26178487732.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfc8767b4e---52372087286.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/ludozikatiwufaxoposu.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607155c3c1051---wanix.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/mj11ofmj8a2i4m9bc1vba8qhf6/390780880.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/83633382793.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/79868794408.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/xoxoxikiba.pdfIn PDF document text
    • https://digireg.nz/upload/29820110436.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/wimuparusiwuvuse.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/49968342799.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/76619148032.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/4a01b648d356a467ad941b12bcb729b1/taxinizapilemivakejosul.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/dcfd5069c696243593de0d6c57e54dbf/4115544502.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/xusapekebosozorugida.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/jasetagime.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/godokuwopum.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/58921812793.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=tabla+de+conversion+de+presion+pdfPDF 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_off0000d4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E3 20556 bytes
SHA-256: f2464e83e8ac7e770c6d45a16cd61d2a108310e806d1c640754f317770686c8c
font_01_sfnt_off000109bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BD 10684 bytes
SHA-256: a9318d3392190a1e8576289f542c8201f957509cbd676c5c67154d46a639d5bc

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