Malicious PDF — malware analysis report

Static analysis result for SHA-256 f117cdc8bf659dd7…

MALICIOUS

PDF

77.2 KB Created: 2021-09-28 01:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0f66cdf3b21a2952f1e87494521fb023 SHA-1: 85ead99553d1d2b8d322e32f2fa5b18de41514e1 SHA-256: f117cdc8bf659dd701966d1a2ba78158b7124ae5d1f392f3cf7f11cc390c5693
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 websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://cructi.ru/uplcv?utm_term=johnny+english+2+full+movie PDF link annotation
    • http://budgettranslation.hu/sites/default/files/file/6702509520.pdfIn PDF document text
    • http://sunway.me/uploads/file/1010251569.pdfIn PDF document text
    • https://qnzar.com/files/85844999735.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/4448737806.pdfIn PDF document text
    • http://tt-ural.su/admin/ckfinder/userfiles/files/jalawed.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/37479917773.pdfIn PDF document text
    • https://lean-ds.com/upload/editor/file/bezaporesutopo.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/81330882447.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/gokel.pdfIn PDF document text
    • http://traiteurluc.com/userfiles/file/26290772833.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/50852997877.pdfIn PDF document text
    • http://stonebreaker.at/mimivafuxoduwuv.pdfIn PDF document text
    • http://fge-service.com/userfiles/file/tusuresifurulesako.pdfIn PDF document text
    • http://dkind.net/userData/board/file/16297119659.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/poronaz.pdfIn PDF document text
    • http://oawebserver.com/piceditor/file/lujefitofixur.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/81832132110.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/93184739308.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/84e83f454dfa6854a5234eafb15d159f/87517525644.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/ffcc4uc67j58982hbpbih1l7li/mabuti.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/viwupunanetidemeje.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5e4c29ebd---dezisosidawenaro.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/buwararad.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/20840104219.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB99A 10692 bytes
SHA-256: 8b9c87a3e3dcaea4ee73ab0a320b22b15df64ce2a4907dbaca3afcc04f3bb9e2
font_01_sfnt_off0000d1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FF 16264 bytes
SHA-256: 663f3d71bcb6fb8d32835e3a3bc2391771ce99e8ea99821764163c37604c9400
font_02_sfnt_off0000e7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FA 15264 bytes
SHA-256: b40c34ed8ac392cb00c98257e26eac71f89a797190b579d23b7c29a1e99a1c63
font_03_sfnt_off00010ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1