Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e740f647e59540…

MALICIOUS

PDF

72.1 KB Created: 2021-06-23 02:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0a60d8937dda35b9df6d1a3cd4c711c2 SHA-1: 64f3e2c50e365d09844cd1ae662c1b6c29779f70 SHA-256: 69e740f647e59540bcd8564a4511197a244d3f28d8c5c252327cee7573c35773
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware delivery mechanism, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7739

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://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c867abc27c---79437179494.pdf In PDF document text
    • http://hotstamping.pl/files/file/90756645886.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/fimanunixekijimisivo.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caba543456b---27235687771.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/dugotozakeraxipibonaxu.pdfIn PDF document text
    • http://texmet.pl/userimages/file/82903476977.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/m2q13o4rom0lkpftsd63ta6doe/53465696806.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/navomovirugimifiwi.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db5440dca1---xajuxemafonusewipobozemat.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c192be7dee---sineg.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/6fc10d4f377c40d8ea420474e8de4565/gabelanujixopaxezowuzen.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/co8l3rdit0r8jvefh3b6h3092b/zesozo.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/52b6d4ee838349a6787cfb06e0d09a3f/10252721902.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/403c76369fbf2e30c609807870c71743/forizazinotaka.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/dakizagulajij.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f9840f8b58a22eaabfcc241238a5184a/jufigilozaxebamanop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=compress+2+pdf+into+1PDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F0 4940 bytes
SHA-256: 8a98f46d45fb1d27fab1a63bd7d3a8f5de373693f0c9bcc9402239d20ba8d3fe
font_01_sfnt_off0000f8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A9 10568 bytes
SHA-256: 7bca1813b3ad6106be7eb2f1742f8e081392625b7428dcd7763c68bbd633da17

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