Malicious PDF — malware analysis report

Static analysis result for SHA-256 45393b6b576f7e0e…

MALICIOUS

PDF

79.8 KB Created: 2021-09-01 10:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6b236a0237f51f2ce6ab7abcfbc89617 SHA-1: d661b11cd4df3617093947c235ff25aac49c2b09 SHA-256: 45393b6b576f7e0e1ed75a52eb5293871c285fc15c904cf1595a166728b4985b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicative of a phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. While no scripts were explicitly extracted, the structure and embedded URLs suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

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://vgi-vn.vn/app/webroot/img/files/48083893549.pdf In PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/ec51cb23a4da747a2c6851ebf56282ea/14573572513.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/mixeribeniz.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e354d5af153795f67e2c538deaaffd4e/97880435064.pdfIn PDF document text
    • http://salt17.com/userfiles/files/suvezatemakijibose.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/33061425239.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/vatepukuxi.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/1e1d4c6d306823edfa3d057706e76550/vevoma.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/jalemixojuzaneg.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c112489c404---36812159007.pdfIn PDF document text
    • http://mamam.by/upload/File/file/29311833242.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608808e96f979---80386124435.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/97524729908.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/29222151455.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/79430656692.pdfIn PDF document text
    • http://raczcsalad.hu/files/xijedakaper.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/26131489049.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/rarofilumamedigexog.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/a626367fcd26fc32b182b08bb13ad749/16377103743.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/47959854350.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/kawowifu.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/72315195497.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/sevoralisakovesisekur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=best+players+to+snipe+fifa+21PDF 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_off0000eb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB94 18596 bytes
SHA-256: 6aa2235f7dc614c3c4d90e9f7dc56cf11386549514f8191e2c89c419bce51b06
font_01_sfnt_off00011bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC5 10688 bytes
SHA-256: 4380bb1565218491a9a2260725c118f38321b639f6bf1e634ebb3dcacbc8e349

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