Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bb1f3c3aaa6909…

MALICIOUS

PDF

101.1 KB Created: 2021-08-13 03:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 50389c984c6a730359fc36b7df3f42ee SHA-1: 89e9210d45aa46fb1dc3786eba4e516b64c8cd2f SHA-256: 64bb1f3c3aaa6909ad5338b7514053f63a823c280523c27eb957edfd6c03f3c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to compromised websites or disposable hosting, suggesting a link farm for SEO manipulation or phishing. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate attempt to use these links for malicious purposes. No scripts were extracted, but the overall structure points to a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/12d370e9f98c38ee82b54768b30d82ac/xasomofesafusitupebunamaj.pdf In PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afc6de02e23---guwalamafomurapex.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/88731509449.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/41350416852.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/hq0n1gh8gin1ueb0t1qcg6k6fi/nelavoli.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/4124981588.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/vijalema.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fb108435e---dajonimalemikuvafenileg.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2eeeaa028---90802504629.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/sadenitumowamu.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/14606203140.pdfIn PDF document text
    • http://augsburger-dartliga.de/uploads/file/7720813990.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/41939458911.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/4d109e4ed09e9fef4ff80b891dda4313/manuwigeli.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/29214826693.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160da1e1d4caad---wanutanozisewerulogitef.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1539074fca---12224300413.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607200428ad26---najetug.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608379d296a09---datiti.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/risoraxelusit.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/30745705643.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=ortega+y+gasset+libros+pdf+gratisPDF 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_off000122f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B02 19208 bytes
SHA-256: f5c692ab94fb63d6173853c5cdcb471bd3cb69d5c0af8ba149a86453db113577
font_02_sfnt_off00016c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C16 10848 bytes
SHA-256: 12e5335a4ae05149be323ec4019b66fa8cc7bd7f0413c5f38afcbbde8c750c21

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