Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b48ee0c0834414…

MALICIOUS

PDF

71.9 KB Created: 2021-09-24 23:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: df67b739661fbe0b9ecd896690e661a7 SHA-1: 16281c087baf47407629943856ba82493d1e6400 SHA-256: c7b48ee0c0834414c54adc9d513c020daa127686331b993916c50a9310dfeab4
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://maekuangudomthara.com/ckfinder/userfiles/files/71284800995.pdf In PDF document text
    • http://artetendasud.it/userfiles/files/45170579573.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/75922258877.pdfIn PDF document text
    • https://okazionche.com/files/jaminumibawafupope.pdfIn PDF document text
    • https://www.alitec.es/js/ckfinder/userfiles/files/batonawubuketagovewudu.pdfIn PDF document text
    • http://eichler-kammerer.de/wagivusufe.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/bupupadejojaruxizi.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/90509645241.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/kowedoletosupubis.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bf8390d188---93021049409.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/86119947430.pdfIn PDF document text
    • https://jamurgoreng.net/contents/files/ramozamuwo.pdfIn PDF document text
    • https://www.canoe.ro/Extras/ckfinder/userfiles/files/23220820473.pdfIn PDF document text
    • http://thevale.us/userimages/93302600088.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7f71ef7a7---pagalozadidam.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/4171541432.pdfIn PDF document text
    • http://kodemari.info/data/files/46189988968.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/a552053518ab02c1840539b3a6d41315/2387306168.pdfIn PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/jefazawofivabusegizekof.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/43632419712.pdfIn PDF document text
    • https://sinarlangit1.com/contents/files/31058275380.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/46506321955.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/31013418066.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=eka+sarayak+amathanna+mp3+downloadPDF 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_off0000b15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB15C 18600 bytes
SHA-256: 2f8465d66ff6edac9936f195efea033f063658fd7ecbeb1893ed4fcc7f365fde
font_01_sfnt_off0000e11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11D 10880 bytes
SHA-256: d12616c63c7efd28f40cb738fed4fe3d0c764e103348b942414e3c626c62b6e6
font_02_sfnt_off0000fa30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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