Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7bb446615a2a947…

MALICIOUS

PDF

72.0 KB Created: 2021-07-16 02:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: addc3f75ecc37503bffbc6779fac812d SHA-1: 1582987eabdd14b51dbe32ecead50e2e6b72e9a8 SHA-256: b7bb446615a2a947d6cf24e21d4c4b22d2eedf68df5946ac0e8870550c262a11
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5901

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://cepsagibyachtfuels.com/images/photos/74109418934.pdf In PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16096858739c4f---70641677848.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/jaledoxatosato.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/robuka.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/57490633847.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/xumekolun.pdfIn PDF document text
    • http://parkwaywest1974.com/clients/861606/File/26556365488.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a45061208a---pemojexosinumemo.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/zepemiw.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16084d987c9c67---95035079280.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/cqni2onitrhqbm3rrfauma5316/ximutobiroruzurunaz.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609adf0d65fd8---sadakiduxiwevatid.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c016e9b0d70---39499882536.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/vejigixepupugiw.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/th4f06odvf8kdkuruvr8kpd2ic/82960129552.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/95095257354.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/najozezulovopuv.pdfIn PDF document text
    • https://businesslife.com/content/file/xajafodumi.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/lmbgnicmuede17128lu7rvgkad/56200942389.pdfIn PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/1058831548.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d863df566---peluxadetibozorugelox.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/18d7cc0a4601194e45289bd5f690be8a/69613953753.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=sql+server+check+if+database+existsPDF 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_off0000e5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F2 10968 bytes
SHA-256: 40e5ef52fb5c0f80beb5e493c44f40d87346b3dc4d5282b7e1b00bfa2742cf7b
font_01_sfnt_off0000ff60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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