Malicious PDF — malware analysis report

Static analysis result for SHA-256 b049b5b4eea37a64…

MALICIOUS

PDF

326.6 KB Created: 2021-06-30 02:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 933867428087218799dffc4e3ab2f92e SHA-1: 4d376c827dbba35c15d779321b47e30df32b0a84 SHA-256: b049b5b4eea37a64bd456575ab1a72b9607e44575410b837707a277614ee8504
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF contains embedded JavaScript and multiple links pointing to compromised WordPress sites, suggesting it's designed to trick users into downloading further malicious content. The high ML score and ClamAV detection confirm its malicious nature, likely as a phishing lure or downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9767

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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
  • 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 https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/5e8aca4a1770fafbc91c37c43ce035a8/3677836237.pdf In PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/29e45ea9860bb56f9bed1f58f7af4a1f/xelagafaxefefaxikolu.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/cd9a65d9b244fcd49fd7fcb1f77caa86/90019842946.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/20005399561.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/1b1736fac37f6d7b28d97dba2bf7c27e/goturejisa.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607885ac56a09---jazalojofevalopidu.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c958c048ca9---67183960407.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/80992d2663c49cc5b33b357aa7df772f/98493296692.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/f42a046867020faec615fc0bf13b0ec9/73557018654.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ad98909a406---33149806239.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/luxijulemoruwu.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/86bd329609dd4af9311fb151a25eed1f/zatosoxaxilozisaf.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/260713077415.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b4d691314---ruradozanajananid.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/30827476271.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/44148972751.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d36719e48---79926054019.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/rapapidonivoxisajuj.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/74633044341.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9eead011a1---28084126952.pdfIn PDF document text
    • http://at2apigroup3.com/contents//files/kimupujugefuvo.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b7e6a0577---mezefiraguxibumoko.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/5fdba74ad56e23d264fb966bf786643c/85430045286.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=cliff+notes+biology+pdfPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/tupuxigag.pdfIn PDF document text
    • 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_off0004a554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A554 10696 bytes
SHA-256: 83f632828d161835dd3aefee5eec7e0e294ac81c7e09bf5994b7bf35316759a9
font_01_sfnt_off0004bd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD96 20488 bytes
SHA-256: ada97aa221110236d1fa3a5402a9c44adf5d5f6231ac5b1b3df26d3f5c10f26a
font_02_sfnt_off0004f3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1