Malicious PDF — malware analysis report

Static analysis result for SHA-256 76deb34b5d0e7ae7…

MALICIOUS

PDF

69.4 KB Created: 2021-09-01 02:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 530e15a7db5a8aa5753c8a864219e219 SHA-1: 63d9b6debd6b77265df0717db96e236820a52ec0 SHA-256: 76deb34b5d0e7ae7c1101f455270c277d2df16e808d7c6cb11b33c272d71c025
176 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing lure, including a small file size and a high density of external links, many pointing to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves directing users to malicious URLs hosted on various domains, likely to download further payloads or conduct credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://smartstone.ca/userfiles/files/10095546254.pdf In PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/fefoforasofidokapuzawidi.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/a4d2f5173d850f2d9df3387a8e9df6b0/lolonisivumadalexabogarar.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/mewivoke.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608e56cf940fc---24068663459.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210731044151.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/21a901b2ec82437edccb1bb411c47a51/81228650576.pdfIn PDF document text
    • http://stl-hk.net/userfiles/20101077165.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/3340775325.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/5201159980.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/97249184772.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/5ee43542d4c1f4b98ddc0a1a6a07ae39/64667571442.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/3182b3e3e912b60fc75c93fad743a688/6554666054.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/10712839272.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc7e21e1846---junagosuronagaluko.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915b3f29bbf---86237189263.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/aca605a4bd83911c6d1fa0ebfcbb1d8d/97860272048.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/71197419859.pdfIn PDF document text
    • http://ontsgoi.shop/uploads/files/zezipeza.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/17011094682.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=anna+dressed+in+blood+pdf+free+downloadPDF link annotation
    • 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_off0000b466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB466 10600 bytes
SHA-256: 01625009326e770ee5cd0be05e2fe5e37c08e0c6eac8162b75f2032d7ff73c79
font_01_sfnt_off0000cc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE494 13984 bytes
SHA-256: 5faa3f4a911fb96bbc2c7c5b4f186267ea5ea9aef3f5e92e469fc4d77fc0305a

Open this report in the interactive analyzer, or submit your own file for analysis.