Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55c162236c95f7c…

MALICIOUS

PDF

75.6 KB Created: 2021-09-05 20:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2e65361e3b9a9c0141987432952e7830 SHA-1: fe45de627a49307732277bc762cc4375ae9401e5 SHA-256: e55c162236c95f7c0e9e62934700350175672a4fe9a3a4dec802e1668208d99b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for malicious PDFs to execute code. The heuristics indicate that the PDF acts as a link farm, pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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.
  • 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 http://keramann.ru/uploads/files/fovowofakaz.pdf In PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/xunugobume.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cced842a4e---30385952294.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/a36j7eisrkf2u8b1ces4407jd3/jowunamad.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/genutorebebuxevexigadiwi.pdfIn PDF document text
    • http://karcannakliyat.com/userfiles/file/wubofetusinoxeziwe.pdfIn PDF document text
    • http://jp-photo.cz/soubory/files/53044823985.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/lometuxaretimulixuli.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/a065943c78c517a1e3d7c694c3e92309/miliwabe.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/71410057214.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/11346696323.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/fm3fdpl2qt4mbrkmhuaqa2v4j6/pafebiwomazaposiret.pdfIn PDF document text
    • http://gestioniarmatoriali.it/21853809232.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/pejibumuxo.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/50659449758.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/63402971866.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/66447359508.pdfIn PDF document text
    • http://feng-shuiworld.com/userfiles/file/tugifozoxi.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/65467351931.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/24726688596.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/80592955870.pdfIn PDF document text
    • http://drive4smilesquebec.ca/clients/f/f5/f58105ca183540932673f5bf18e62671/File/panizelaxoloxiludu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=prowlers+and+paragons+pdf+freePDF 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_off0000c2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC1 10568 bytes
SHA-256: 7c188886f40a86fe047a96597882d4aa3b79129de84c053f87070f972a36a2c4
font_02_sfnt_off0000f2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D7 17636 bytes
SHA-256: bf8f96fb65f986f966ca80cb1f4e1202caf432725c055194538201fb84b44f1b

Open this report in the interactive analyzer, or submit your own file for analysis.