Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c240f129cca0254…

MALICIOUS

PDF

74.3 KB Created: 2021-09-08 07:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 456ca8b734ebf18cd4baed64852af163 SHA-1: 833e07bc29eadffbb65d76da5f939569c72abc2a SHA-256: 9c240f129cca0254411ab3956c571b87acec56cd1b0993f6386283b98dcd7334
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm pointing to potentially compromised websites. The PDF structure and embedded URLs suggest a phishing attempt or a lure to download further malicious content. No scripts were extracted, but the presence of multiple external links indicates a primary function of redirecting users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://penney1970.com/clients/7/74/747debde904cce1d9d58e62e9103e361/File/77026422136.pdf In PDF document text
    • http://1959blackshirts.com/clients/866684/File/86176316994.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/58641269546.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/96344829952.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210807010145.pdfIn PDF document text
    • http://hajnysport.cz/FCK_userfiles/file/50110897929.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d1ff91d96---43651416246.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/fosete.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/fimegiwinubobodutasimelu.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/tinerafefakokosil.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/xeregixebu.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/kametumakosep.pdfIn PDF document text
    • https://ismart99.net/upload/files/17933596926.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/jibavinininolas.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/f78d22f6d1e733dacbaeb71c25b93da6/roxuwew.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/290523276940.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/safurozek.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/21418244468.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/01f326db22e270411764b45c56cf8f64/pivasexog.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/6240996800.pdfIn PDF document text
    • http://rideco.hu/upload/file/7702734588.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/40881667576.pdfIn PDF document text
    • https://topupdana.com/contents//files/31108068330.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089043a032bd---60725926838.pdfIn PDF document text
    • https://paymentor.nl/uploads//file/53454941312.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=ammonia+in+drinking+water+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_off0000bec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC1 10784 bytes
SHA-256: e413c4867d06e9aed6496de997e41519b3ac0138635bc8d65e297f9636de7968
font_01_sfnt_off0000d76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76B 17192 bytes
SHA-256: 2f095351346e5a43de95b174819699b857cf77f641f44278de2563da56adab81
font_02_sfnt_off000103a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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