Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d65b24776f9996d…

MALICIOUS

PDF

73.9 KB Created: 2021-09-01 05:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8faf90373ab17e7224ba25819299a2cc SHA-1: fcc52090fb10e0c38e77f64d5ef6e74469f918b5 SHA-256: 5d65b24776f9996de6cd6e14e799c42a9b150690058c17cf09156a1bf3507fd4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://garglob.ru/uplcv?utm_term=definition+for+taunt PDF link annotation
    • https://alianzatours.com/imagenes/file/sotabujularaxodun.pdfIn PDF document text
    • http://restorationteleconference.com/clients/73716/File/suwoz.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999819bbacc---69012586592.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/c4bf9f3aa7a7150ce6174bf39c63fd25/vusison.pdfIn PDF document text
    • http://lejuriste.ru/files/file/jibemukusunufado.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/91ca32b243ccf6304ac26ce76f0428e8/vabilafaluvekupux.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/34262209834.pdfIn PDF document text
    • https://futurefacesnyc.com/uploads/file/tixixegafavelebevetanaxil.pdfIn PDF document text
    • http://lg-palette.com/upload/files/20341272260.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/95531052004.pdfIn PDF document text
    • http://entrackintl.com/uploads/lozakuduku.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/m1nesqvhci6qdqnvhvm8o296om/86444342977.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/62596508775.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16123aea192783---50235912629.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c58b3bafb3f---65499474530.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/2c1b65ac0d523eddfcce63c0e9f6a715/89714466641.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/luroninamuxelidabuja.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a048e413042---64667276524.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9f0630e83---rozavabin.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/zemewojamereretime.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/gabofutidutubos.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/89331976793.pdfIn PDF document text
    • http://kwartetproforma.com/userfiles/file/vujerekoxatupe.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210827095124.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/likugagofab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE11 17736 bytes
SHA-256: e19ab88d78c4665090114dda7326f13811f672efff028598c77934084da005d5
font_01_sfnt_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 10096 bytes
SHA-256: cb1b02dccafa6f9c244b7c449fc793c3fc35ad62345a3f46cc9dc51271de64f1
font_02_sfnt_off0001019e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1