Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf7aa35c94ec752…

MALICIOUS

PDF

73.4 KB Created: 2021-07-18 12:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3a27d15be81dcd014982f3fdf9ed7a78 SHA-1: 7f7e15c0b7ac501641591d83e121326536d40666 SHA-256: bcf7aa35c94ec7523288e80c511aeba3521a87db70c89ae66ef589378b0cbd98
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple links to potentially malicious domains suggests an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7429

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c63d7fba039---fabifapokavexekivi.pdf In PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5d356158e---63562631431.pdfIn PDF document text
    • http://talleresjpg.es/img/file/40774567866.pdfIn PDF document text
    • http://amandamaitland.com/images/file/92771783411.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/bf77ab7fdb8ab94c8ad6c037a5c038b0/notepaxadotavisu.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa7900bdd4---42521230961.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/vusolebuvesobuvi.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1606f39ed46637---94137460368.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/6d66da340fb2178d8a512ba72958f5c8/kopezejomeritujesisow.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/t4n3t3eapfjm04q9u0k5s5m2q1/nimunafigoxo.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/24488071227.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f4930652d---nojasanupijumikis.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/12572d6f2f9a46c5281e5ac09d1ad94d/bobudopagipo.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe941970fd---xasujugitotamosose.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/famabovobigilim.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608eacc4b17a7---giripijoxebinoxog.pdfIn PDF document text
    • https://motiv8workout.com/up/files/xulikagabeg.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/verazuzajo.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/kajivimefijirenaratupeka.pdfIn PDF document text
    • http://maihome.hu/admin1/file/89791805793.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/45650616096.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/r4regrg282jn0o26jaq306ats6/41046698696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=presentation+examples+for+project+manager+interviewPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 16360 bytes
SHA-256: 1b352f9e0c01a2b0395ae0d5a478509e533173eab72a6b714baa05702d6d5430

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