Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d4fa7d07ae7f013…

MALICIOUS

PDF

85.5 KB Created: 2021-09-01 09:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f316ced0aa23bc61f4455d5084117a14 SHA-1: c51f8ccb328c286a68e5e75b229beb88e5e8510e SHA-256: 2d4fa7d07ae7f0130928fcea8110efa29c6900b51f7fb6a6e074283a78338a66
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal that the document functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The presence of numerous unknown URLs suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce579b1196---29383494745.pdf In PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/a9f9a316bdf401e32e05bc0e015421b3/ragifaratixutije.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/84546560150.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/261721521960.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/98776573623.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/87baaf9b2221869c7cd0d410aa3d6465/firakudosuvoripojenadoda.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/8cbd3f107431f2dccc0de893947e7622/42155429186.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/pbbhq0str2g5cd2fellpholqk7/pulufijebiwisof.pdfIn PDF document text
    • https://lecapsuledigian.it/file/58360026880.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7cca486518---59022124166.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a1e2ca799---23571685520.pdfIn PDF document text
    • http://unsersohn.ch/images/file/devumupitopokerovex.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/pabuxixagipekuv.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/jhfeu4m1vo0d6fkgbkp48292g5/zigig.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210714053252.pdfIn PDF document text
    • http://starke.ca/clients/84205/File/90318789798.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/52418178874.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/sexizademororobirezega.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/93715489280.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/doraxovenadita.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/nejubi.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/todupos.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160753e0b7773c---41474228415.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610fbac78f050---6446696922.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/69731505151.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=definition+of+persistancePDF 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_off0000e40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC21 10428 bytes
SHA-256: 6e4caf0fd56442571b0c4a0f654c7b2cf27bf1a69d7c646f9daa8da53d668f3f
font_02_sfnt_off000113ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113ED 20172 bytes
SHA-256: dd1b9d26e0dce6c45e80c1bcb0948e2ecfeaef2128833452a688e9a5783ec049

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