Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4e771f21afd167…

MALICIOUS

PDF

81.8 KB Created: 2021-07-22 23:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 6badae2094eb8f6655edb8c3be0192c9 SHA-1: f44f54a24147a08577ed7d514e127b986b84c5d1 SHA-256: 2c4e771f21afd1674d098ba524a4bf384bd4b534d61bcd774c3a52c101494adc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to compromised WordPress sites, indicating an attempt to host and distribute further malicious content. ClamAV detection and ML classification confirm its malicious nature, likely for phishing or scam purposes. The embedded JavaScript is likely used to facilitate the download or redirection to these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8462

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866db62b3b8---27562934708.pdf In PDF document text
    • http://php-lounge.de/userfiles/file/pimawunisalero.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/adb8d7404f237c2da8835599ce024468/luvovefibegirajufeniname.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609479b49952b---11241397932.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/cd6163675627baa4bf16bd87952831e3/gigetusazokukepopu.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/sujuxobufoguxejijufagere.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4d84f32ee---fuzas.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/rikoviper.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/wipaduxi.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/8a6eca0ea9ed207ee3ce8f61ad828f77/rosedajokagunanisareseno.pdfIn PDF document text
    • http://etnorom.hu/pictures/74212874109.pdfIn PDF document text
    • http://gdgom.com/upload/file/2106200227229899806721u17bws1p.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/99795984987.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/49916479277.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/40967059833.pdfIn PDF document text
    • https://himanshikitchen.info/viking1/uploads/files/53000502953.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/bn1k8rju95j5pdj7c8jb6uu6b6/vopebanofedixizusuvevirut.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/vagujolijakudusunoxumira.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/0755a91c36bbed5eaed445dd4f1c846c/35570919312.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/vetuzadiwozoxovabo.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc9f1b3d33---85273992029.pdfIn PDF document text
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/94915626309.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/82d8e8f522c37e0c0119e4a02cdc6ae3/zajorafisafugeporevevutu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=nories+table+pdf+free+downloadPDF link annotation
    • 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_off0000e8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E5 10692 bytes
SHA-256: a0d39faaf9751682f03e6054ae42dea717b5a47c4fc23cabfda79ae9f87f516f
font_01_sfnt_off00010164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10164 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11976 17068 bytes
SHA-256: 54fa75982873623899854c1c4fa392ef579b91852f32ebf9820c755424732d20

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