Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e31d61acee6cf22…

MALICIOUS

PDF

94.0 KB Created: 2021-07-23 03:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 01d355af0758952064fe80361a2a8e43 SHA-1: 898d0e5eaf6ebfc66104edd0f87ce6a4c606d818 SHA-256: 5e31d61acee6cf221626d4541d88e27b37dd0a63b0e6dbbdac424df2a46909a9
156 Risk Score

Malware Insights

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

This PDF file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The document contains a link farm pointing to multiple compromised websites, likely to distribute malware or conduct phishing attacks. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest this is a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0dc0dc82c---32300297141.pdf In PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/5b1eadf604ef9394955544f588bbf759/xumefaludiwovobe.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cce7109380---64909558825.pdfIn PDF document text
    • http://scro.ru/pic/file/94124086048.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/70551eae8300eb80e316ce76e69ea39c/kezid.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/38ad3342db1cb0f63c9c699e48a99554/gejotenik.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/80a5833f2ff5a09ed55a714ef6bb479b/zuzunijegavawide.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/da4087f09f50de4f2e1bd76f1eb9cf88/mukatilobimovipejinupori.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/vejitodi.pdfIn PDF document text
    • http://edgewood1962.com/clients/2/2b/2b25cacec04995aba37d275b9c35b4d1/File/razajefifidan.pdfIn PDF document text
    • http://industrialdevices.in/uploads/guwikuroduzadan.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2a8758b10---14064928612.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/pohocec4211pfstn7qhb1ere37/96283047621.pdfIn PDF document text
    • http://europavloeren.nl/siteimages/file/1250055279.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88a98c258---15904667447.pdfIn PDF document text
    • https://italvaping.com/file/79870424538.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/7a32be323aebbe86350af088b466c887/20083077986.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607255528c3af---lomilenigudazimorotoxava.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/7bc1b197ee7074994b8cc1933ed41388/63140276353.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/4b7f8aecca9186a0a51652f4b49562d3/pevadogetikal.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/92c7f2b4d3efe575d780d9fa6fe0466f/ferinerefaxegilifam.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/18329342759.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/rulebodomogutikomekipex.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/51403030243.pdfIn PDF document text
    • http://garystrike.com/clients/3/30/301ae0ed988f9237e4cb8f8c41f6cb36/File/wizuxavisutepumovabidifub.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/vmdoid0r50lpupa4kvl7fbac4h/gixafimu.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/reluduganimudule.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=java+concurrency+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_off00010eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFF 16412 bytes
SHA-256: e565be9c288925e4ebd36679ca30e40e5e5c90c2792e147665ea8b7ea27c5669
font_01_sfnt_off00013999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13999 10480 bytes
SHA-256: e484aa664cc5d0e30f3163d2b8be2475bd8e6bb9bf69405a311e43bb084121c0
font_02_sfnt_off00015192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15192 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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