Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff650544b28b1c1…

MALICIOUS

PDF

67.5 KB Created: 2021-09-04 15:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 684188315f3bb9d10202f3916567577b SHA-1: 3fb2f7a4405e270dddb6fa61ee05d7771c02f1b3 SHA-256: 7ff650544b28b1c1931b7adc8f0eaf0c8be8cfa444ce8af01e0b0eb93b70e2f8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to manipulate search engine results or lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8456

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://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae9264c3cc---22624962668.pdf In PDF document text
    • http://gursakaryahukuk.com/images/file/gefukudanumobamofezub.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/9rakfdp8lsbulg2fl84njb4job/lobizotomixu.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/90cf43e3d97aa44ed789ae4e096e8126/dixubezasukikanulaxor.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/80906876040.pdfIn PDF document text
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/dcb5ddc0f75a8cbe2309df4d1ef57a7f/98394343612.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/84643140560.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2ac03513e---60237006882.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/jnc10h0n39u7ikhqef588k4qlr/73114932216.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/nenedasixojadosujanev.pdfIn PDF document text
    • https://iwistw.com/upload/files/8173365031.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/jidizusit.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/1786b24e35510a9b18fc1d636d45e0e1/bonomezuvofafilepe.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/4d8e19d86cb3a344e4e09641aaf0da3d/vezotafisutugage.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/xiwubatigur.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/88763743167.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cd832b492---11988537539.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abe6f365df0---58879887609.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/lexusimezutitab.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/11666454847.pdfIn PDF document text
    • https://dineflon.com//files/roguzakobizuno.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606d09c75caf8---tuxonuwafotasesekituvis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=laissez+faire+leadership+disadvantages+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_off0000e097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE097 10740 bytes
SHA-256: 2259337df71a807a52e786374eaa17bd5a6b6029524d6cb42ffe28b2f5ec8b59
font_01_sfnt_off0000f908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF908 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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