Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eea325cc9712084…

MALICIOUS

PDF

81.9 KB Created: 2021-08-17 11:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b07cff1010720a7933dd2de5031a6a86 SHA-1: f3dca0d6af35f39be0afcbc105acad568f6e7314 SHA-256: 6eea325cc9712084461036533a9fe49f3ece04d6661f76f928285d59e5142809
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs pointing to various domains, many of which appear to be part of a link farm designed to obscure the ultimate destination. The presence of these URLs and the overall structure suggest a phishing or malware distribution attempt, likely leveraging social engineering to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://crysiq.ru/uplcv?utm_term=aditya+birla+health+insurance+claim+form+part+a PDF link annotation
    • https://proxus.nl/file/90608683880.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/90379973655.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/fuladerotasutexa.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210817121719.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/50301817794.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/vunejediferoki.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607054395309b---zazezites.pdfIn PDF document text
    • http://standdominica.org/files/files/62796106742.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/f4s13vamp69qgi1j6b6l89u4m5/nosizesikilasiwekafo.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94aa267109---vawozebiko.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/48349160216.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160da9995da779---puzasokujujikitobes.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c666c9bb54e---69148723927.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160825a4897b42---17061066775.pdfIn PDF document text
    • http://apricomm.com/userData/board/file/sofix.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/59354852503.pdfIn PDF document text
    • http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/tixisikodisi.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607207c4e3703---roxajumupa.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/0urrg6coeqmprkrt806l7mmj7k/ximetezeraz.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/89697496169.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/boluxusikorem.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/96dm3d7knl07omqrpc7rdkfuc5/jibanikulalofuxurukid.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/15814585715.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/e0e751a8b069a30c548085f1436f16d5/31344025035.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/961427b28e7a1438f16ca239909bca14/80732269041.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_off0000dc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC92 16632 bytes
SHA-256: 400d151b232b7f1079eed12904e85689341ab835e78454779999ea01b9e92379
font_01_sfnt_off000107b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B0 11220 bytes
SHA-256: 2daec2493d0ab76d914228ea1184dbeebd8e4554887a33abd5d502f13fea4bca
font_02_sfnt_off00012198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12198 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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