Malicious PDF — malware analysis report

Static analysis result for SHA-256 f50674231a0a2c4b…

MALICIOUS

PDF

222.0 KB Created: 2021-08-05 04:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e9a063d796130e7b342ea3e1d0011d0c SHA-1: cc8cfe4c1ccff8446c9ddfe7341a859d00c154c0 SHA-256: f50674231a0a2c4bb9dad3a3a11aeb999b59702d276547482e5b49957e106dd3
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains multiple embedded URLs, including one identified as an SEO redirector, likely intended to trick users into downloading further malicious content. The presence of these links and the overall structure suggest an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9124

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://crysiq.ru/uplcv?utm_term=rifts+world+books+34+pdf PDF link annotation
    • https://tantecoccole016.it/file/zunebivokowoxubuma.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/949669a781126a0c834f7593308c462a/jovugonubonefijowazov.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/3046364891.pdfIn PDF document text
    • https://sy-tech.eu/file/88854111548.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac243410b3f---70338589190.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/btlu3f2s3b4tr86346hbt1c635/teladolowuzokejevoraxovut.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/topeluzab.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/31556416489.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/66009996206.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca3279340d---22022587327.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/7e5fe0bcfb08ae82fa84e64a022a6d8f/8117592882.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/wupawapazinu.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/c93f2879940a4f0f119f70d5429d07d3/lazas.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/bc67f5ed38ec4a59e3ff684e9f2f8eea/xogegadosusirisila.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/17415699252.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/97967458751.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/n6kvhgg6vpl2unfen53bam9pfn/96075518318.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/lukalen.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/73379132911.pdfIn PDF document text
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/78643090337.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86afe8bd2c---22203576957.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/bisubobitivalawe.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_off00030078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30078 10704 bytes
SHA-256: 8a6241e8bd4086405fc217e7b5bf96fc030123f1d3155c0eb98b3f88c48a44e3
font_01_sfnt_off00031905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31905 22768 bytes
SHA-256: 76c2fea38c2fc641a09b0e3ee457f50c863c8ff74566973514fb1b3816bd0cfc
font_02_sfnt_off000351b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x351B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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