Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0df48e44d874b6…

MALICIOUS

PDF

84.7 KB Created: 2021-09-15 21:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c111a0d44834fd4b085809b044b6cbbb SHA-1: f669387f0338f7f85d32fa5d856d35b8863dfd61 SHA-256: eb0df48e44d874b6ff68b89d868777e477c8e2a155005add7bbf82091ff22fb7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms on disposable hosting indicates an attempt to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 6

  • 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
  • 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://crewmak.ru/uplcv?utm_term=wandavision+watch+online+fmovies PDF link annotation
    • http://didopack.com/files/bulogofotasivir.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/99654974281.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/73343075068.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/6d6b92441919f754edc47f299b2f42f0/ruxafanu.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613889364fb9e---felana.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae962f024a---38100835248.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/41944013870.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/ripul.pdfIn PDF document text
    • http://akiisushi.com/uploads/files/40981651409.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/31055103060.pdfIn PDF document text
    • https://tavio.ru/files/file/buwat.pdfIn PDF document text
    • https://aecvfcom.nrgence.com/upload/userfiles/files/40719673472.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/62952696483.pdfIn PDF document text
    • http://restaurant-lyons.fr/userfiles/file/xipenokupafepikom.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/kefukapadoxovijepus.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/50032079749.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021090806325453.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/1630834987577139934.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/gizononomorifekumizuso.pdfIn PDF document text
    • https://foundationkuzmanov.com/files/vozigokepafevajowesebe.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/63189017863.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/pozepifabibenorolaxuk.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/josaxemininaj.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e68f3bf87---gamedefakifabevi.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/7f365373709a4747663c212d0fab7b80/jagutamumi.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/vunadapotufa.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109041244421472.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_off0000e26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26A 10788 bytes
SHA-256: 8635186b38a430116be0cb6239836d02d1110001cd2f9c5002f0d8f0949c4c7a
font_01_sfnt_off0000fb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001132c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132C 18920 bytes
SHA-256: 8f9e18bd0882194070c282f22f86c10ef27e5bd17ba1b92805f7db1059b8781a

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