Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b467268959eb7f…

MALICIOUS

PDF

85.0 KB Created: 2021-10-20 12:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3f002b32a7a3fc6d8a248abf88bf6c8e SHA-1: d7bd95b8357611d6f1e82f13e2fd76183b6a59eb SHA-256: 63b467268959eb7f6288e46e1c250592b38535d297dd3b7e014f0b320c703d61
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable hosting and compromised CMS upload storage, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://nage-z.com/ckfinder/userfiles/files/wuvuwaniweme.pdf In PDF document text
    • http://sineadstone.com/userfiles/file/winobuganajaxonozajisanar.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/93042020332.pdfIn PDF document text
    • http://inphuduong.vn/upload/files/mojuwerisijenivu.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/2d09a455c1742d4cd4f63f3c459c70c0/nagosadobuxogedura.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/xexovejakujedodowave.pdfIn PDF document text
    • https://taperagi.com/contents/files/36426636765.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/1960491511.pdfIn PDF document text
    • http://marikitaberbagi.com/userfiles/file/xumagune.pdfIn PDF document text
    • http://video-cycling.de/files/file/labefume.pdfIn PDF document text
    • http://registermycompany.in/admin/userfiles/file/33757356176.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4f5980bac---37015316193.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/29980679568.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/31949004231.pdfIn PDF document text
    • https://apapunada.com/contents/files/zejuwodageme.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/43499987353.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/89055426072.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/85328581625.pdfIn PDF document text
    • https://foodthings.us/userfiles/file/32276396200.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/8747d29fafd8952aefe6f2ce291ec5de/52535757421.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/vopunim.pdfIn PDF document text
    • https://www.casestilistas.es/ckfinder/userfiles/files/libodibuxififijivuzuw.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616b76bf0767f---10147474357.pdfIn PDF document text
    • https://polandpools.com/contents/files/nawajenuzozamuzubexuw.pdfIn PDF document text
    • http://seikico.net/img/files/petopegosirinunimapam.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/tgwjJlsMqHc/uplcv?utm_term=tabernacle+choir+duel+of+the+fatesPDF 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_off0000e4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E5 18068 bytes
SHA-256: bbd8af46beb3533ac9877b056d73e36311900de1ee09b130ef25100e2bb08ecf
font_01_sfnt_off00011408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11408 10776 bytes
SHA-256: 981504b2d2ac0b1c2597fd219ea6899633659cec374b7b7136e678310d80ff21
font_02_sfnt_off00012cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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