Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fd071921428880…

MALICIOUS

PDF

78.0 KB Created: 2021-07-04 08:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 63107bf76f2143c8598cf7a61a3023bb SHA-1: eb0c3c7212605f047b5bdd4149bb4e66d3e586d8 SHA-256: 62fd0719214288805d2d998e15101d1ceb2fc9a61e98463c8446bd8c8b686273
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8748

Heuristics 5

  • 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
  • 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://crysiq.ru/uplcv?utm_term=the+wolf+of+wall+street+google+drive PDF link annotation
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/06feb15f311006422a33df9729ed5616/59535209357.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/96816088531.pdfIn PDF document text
    • http://mhspartan79.com/clients/9/97/97d0d0788ec4d6723ba7be3cd58769e3/File/natudupokirikekezoja.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/boputor.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/8jaqbgeck7j7ck1djrrhib3gg3/werufufoxov.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/9k3sckgqcba2mhfskrq8lskblm/89202285701.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/romurevatukamulofadafi.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/38198296232.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6f05f01a7---vujiduforovefinape.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/dijenigizukidivisatu.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/8jrt4bfim2h33t2uktkshs9kcv/nojedipopobulogil.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b114ccc4a21---84492213199.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16084d31730684---bodos.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/7b172dd3ff8740d51e419cb1ca14c069/vafiligipadizomofe.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6af431fc9d---rareb.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608392a122c97---wenogavolimozotozej.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/7c042f1c2bb8d232484dd80903c30212/mijoxakejizenen.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/9d25d9c931cfa5cf88f7d379d46ebb8c/dumaxuwumakositamoge.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/nabf4ietqom7iin6ovkivendo6/74838991889.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/bb79ae3deaf8e4edf1823f3a50152a35/42305729262.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160adceb7d53ac---41304415234.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/f7b6bcac3cf513c90f20ae52c26016f7/31533113224.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A8 10644 bytes
SHA-256: 70101fa2bbb4168a3c101e70f8d09acb47ab0920f51f0feabbc2cd18013acbac
font_01_sfnt_off0001100d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100D 17664 bytes
SHA-256: f7e74037cf6af6c3c226ac6d81ac3d215d94a78f4e978190d063dff2fe5f2dd3