Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe53a1c17f80179…

MALICIOUS

PDF

81.5 KB Created: 2021-09-19 17:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fc334349bc15cef27e984e061484e56f SHA-1: 30c6a9148e6762c2b92128a3d45f443203657d44 SHA-256: cfe53a1c17f801790adfc4666c24baa1512c8274ae4bf8dc82441eca5f4d02df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics as a link farm, with many URLs pointing to disposable hosting and compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://coretry.ru/uplcv?utm_term=nba+live+mobile+android PDF link annotation
    • http://kartinatv.org/uploads/files/fuvazoz.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145941c2f209---94644104944.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/76085403465.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614000216737c---duwigonigezibikezibeko.pdfIn PDF document text
    • http://clinton.abwingsmd.com/uploads/files/4877665709.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/46072850845.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/59720089758.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/79688572316.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/napitenuzuvexafodafo.pdfIn PDF document text
    • http://jedwines.com/cmsCart/upload/file/28078562333.pdfIn PDF document text
    • https://masihpt2.com/contents/files/90288312960.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/gigoluka.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/48812599144.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/006a0395acf138e008633feb3a899bd0/34219323298.pdfIn PDF document text
    • http://linker-apps.com/files/divudini.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xamutuwavupur.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/64071ff9530cd1e563c00f1fe1188114/risotuvafenekowurefesagag.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/72277166023.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132faeef15c5---lidutufevapejiroj.pdfIn PDF document text
    • https://hidropomp2008.com/uploads/userfiles/file/xipijawoseliguman.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/86282557331.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/tikofonemukane.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/94592818979.pdfIn PDF document text
    • http://davcpundri.com/css/file/39279162104.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/76459375584.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/78406877824.pdfIn PDF document text
    • https://magnanelli.com/userfiles/file/99338924622.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/80918057496.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_off0000db96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB96 17528 bytes
SHA-256: 173feb351fc4291ed489156042c55bc021b292949ce6f063d2fad7785275e7d4
font_01_sfnt_off00010950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10950 10328 bytes
SHA-256: d04fca8fe7f90b7c1d410b5f60d406ceeb301b0d8f134a943f88b2ee155bf570
font_02_sfnt_off00012087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12087 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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