Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3b60e1ffd43e8e…

MALICIOUS

PDF

62.3 KB Created: 2021-09-28 17:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7af1751a69caf5a9749c0e090c91ee7e SHA-1: 7551c38faa15b70039fec22c0b3b13a84cd2a585 SHA-256: bc3b60e1ffd43e8e611a237f578994d85db26de666795e63c9b1bfc2a6b9c4c6
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2574

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://nomylo.ru/uplcv?utm_term=watch+jurassic+world+123 PDF link annotation
    • http://bankerz.in/qpic/files/risesisurefidumesatemine.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f3229c9f6---bakasakijezivagisedetetad.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210903191352.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/nimojor.pdfIn PDF document text
    • https://soswzgierz.pl/web/uploads/files/ridiwidoluguwu.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/rusadimunevoroxijapivowo.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/mobima.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/63a07e5044a2e7949c184cd6f7b61c0e/tesojufidipi.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1614c3e1eeb095---91745045698.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/21784188570.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/4206689438.pdfIn PDF document text
    • http://samafb.org/uploadfilefiles/42075939815.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/40928717086.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/zobiwijogiwoduwanabipati.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/29581695254.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/guxopo.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613421cb1bea5---7805150157.pdfIn PDF document text
    • https://ekransamara.ru/files/rumupowage.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/zazumigarase.pdfIn PDF document text
    • https://robindayne.com/ckfinder/userfiles/files/dikaximaxowiguxalezel.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/raginob.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/tuwexusitaj.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/54209221977.pdfIn PDF document text
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/kigepezazuj.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/jejakoxegovawi.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16147e8e977849---fapan.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_off0000b5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E3 10884 bytes
SHA-256: 571194062a088045d36cd90966051f7da9e34116af91aa33ca608e153f813002
font_01_sfnt_off0000cf61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1