Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7faaa2aec1e06d4…

MALICIOUS

PDF

74.9 KB Created: 2021-08-04 03:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6b5019bbfa16f9a829a96b161358817b SHA-1: 268d61b83dc3af2ffdda7e9ae022924a4bc56109 SHA-256: c7faaa2aec1e06d47028cff0c96b926f04262b84cd5ffae2f9de381ef1c4f60d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware distribution sites. The structure suggests a link farm designed to obscure the ultimate destination and leverage compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16090c60ce2efc---25377393735.pdf In PDF document text
    • http://agrobud.net/uploaded/file/62287415872.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9efcb8406---69693693857.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/82596605314.pdfIn PDF document text
    • http://doreenindiatours.com/userfiles/file/xekegeravedipu.pdfIn PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/nelinilavesawi.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607522d74c6a1---37913124799.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/94957815134.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/tiperojodunedodinojufe.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba915da842---likakigetazaleva.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c9a2bb344---24344422389.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021071603121973499.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/pobexemigasemojobabufo.pdfIn PDF document text
    • http://alkanboya.com/files/file///84758874260.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/gawefave.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/0d0a802fcdb7b60fb56e4ad7c514dcd8/79366741265.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/50323403100.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/pageduwexifufikatugadok.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/54993627925.pdfIn PDF document text
    • https://hagepoorter.be/files/files/mufobiza.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093fe8b67ac4---58514112460.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=matem%C3%A1ticas+para+administraci%C3%B3n+y+econom%C3%ADa+13+edici%C3%B3n+pdfPDF 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_off0000bdfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDFD 16664 bytes
SHA-256: 60b0a538218b137d2ad1b1bd61d22728eaaae9808230bdc79e46f597e28db5a9
font_01_sfnt_off0000e802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE802 11448 bytes
SHA-256: bfdb97362a8463d2d91d53fd2dc337da5bb31bde2e1ab91cfc235c1f099f6a89
font_02_sfnt_off00010270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10270 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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