Malicious PDF — malware analysis report

Static analysis result for SHA-256 17bbde7fcf7debfd…

MALICIOUS

PDF

87.3 KB Created: 2021-07-03 02:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: aee33e4ebae90f430faab365ecabb2b7 SHA-1: d38d62b206065bfdb0e422e8bf0b3452d183eea0 SHA-256: 17bbde7fcf7debfda29ebad1766adb5144e95c98b6567e8797fd5e6b6a3965d5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of 'cmdv86r0sk6nogls8obqhec0/95222429591.pdf' within a URL also suggests potential command execution or obfuscation techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://allytemp.ru/uplcv?utm_term=your+biology+answers PDF link annotation
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607071b2090e4---zalubatorubij.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202106040936189542.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/gicmdv86r0sk6nogls8obqhec0/95222429591.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/er1e3m5ti2duv6ghfb0g37efs3/90473974698.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160770fe85e7da---guteruritejadevomu.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/pewegedew.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/gomexagarevinepajedazox.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160942ffc47453---faxakijisivepi.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/77498154792.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a73723bf360fc07faf51bea049e9fa8b/siwoputikovenino.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836224a2d40---7699859585.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/sisubulan.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c73f39d17ce---zawegitemagasu.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/71121910526.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/52846407331.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/firovuna.pdfIn PDF document text
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/zatogamiviferupo.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/59614599903.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a1067b2ceb2---kowobiveseneta.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/c6121d3168cbb29de72a223198243966/350582460.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160930aa2e952c---93933683222.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/mexibigeje.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/50607429969.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef4a69185d---16706143952.pdfIn PDF document text
    • https://yourtuscanyIn macro / runtime command snippet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000f0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D0 17748 bytes
SHA-256: b2544c0965369da538e96f9f2f57ad68bac0b74c72b1523ea6e45945f4f0b75c
font_01_sfnt_off00011f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B6 10608 bytes
SHA-256: 0236f0788ed2e6734f9f004d44a39a151ee73d4c16cac1309830a6a283eecbbd

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