Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef1e45ad0e8ff12…

MALICIOUS

PDF

97.0 KB Created: 2021-07-16 16:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 60342d64ffae78f5b11b4648a060b48d SHA-1: fd29e43457cdf83302bd23bfd09a48672ad1e453 SHA-256: fef1e45ad0e8ff125bba7ced7738398314d0e261d4b581accc891e74e4774be8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to leverage external resources for user compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://technology-mp.it/userfiles/files/65002119237.pdf In PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/47547076333.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/aba01172f685e90b4d08ea512522a295/70981931237.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4eb2e4f2c---dugerote.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/531fa30a4c6c3a02c5e76f4af03bf93f/46626639782.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c66c3b4a660---7855002645.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088eaff9dd32---tosofewerosebof.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/88134301471.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/ntf1qo7l45ouh6k9q1mjpioqri/5315452255.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/b328b12918fca5119ddefa1cccac995d/vukabajuzifu.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/45c9913bc425b634877195bbda353c42/80262282478.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/89271312523.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/10541195568.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/xekidasukafemerajubonibok.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b0f91a753---xawefofigudibutub.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/bowedufagosizotinatomini.pdfIn PDF document text
    • https://tanasiri.com/piceditor/file/pebika.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/41351790318.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aef331319e3---55745323595.pdfIn PDF document text
    • http://mlkscholarshipsmilwaukee.org/clients/f/f0/f021f13c5c598389be7e913a1ae626ff/File/48939035762.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/3bc8f06066d347a1d43bf5c7d5510105/kazitalumefinazex.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/supodefodakulotapugeke.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/guliram.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c52dc23d496---10352745855.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/50ab05bdd51e5d22e2ff8a86fa74c2d4/dojizasibitowiwuke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=wow+classic+arms+warrior+pvp+talentsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off00010cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC2 10680 bytes
SHA-256: 180936ad67c7b8e2404a46ea322ed2fa1f3afc978f4f5010f9c9b4de2a29dbf3
font_01_sfnt_off0001254b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254B 22988 bytes
SHA-256: 3bb2555b2d0899b533df3da29722bbb90be13a86f15e9fb57f9477e5a46c5240
font_02_sfnt_off00015e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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