Malicious PDF — malware analysis report

Static analysis result for SHA-256 0695175df55ee699…

MALICIOUS

PDF

95.9 KB Created: 2021-08-05 11:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: fc5d4e8ce9d6601ec425058a0401ac46 SHA-1: 300be4db1d1c2b91b3fa2d7adba2c1e8306e849f SHA-256: 0695175df55ee699a9d160d1cf8cb564a69714c2dae63b9d4cde6d6d6c57d2d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised websites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://betibg.eu/webroot/img/files/91641358585.pdf In PDF document text
    • https://noddy.nu/images/file/bazofonezeletulelirezogi.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/peluvajaserujupiwifag.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/11949187983.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/od3ssbuj9ui7fbq64b9d3eumej/57300612851.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3c7b5379c---xegekifikim.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/a1b4ce96b38e49e42fa1b76331c37f09/39739311804.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161090dbd9e4e9---lurafeje.pdfIn PDF document text
    • http://hutergroup.de/userfiles/file/96669476215.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/ratofu.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4769213a7dc053837d16d4370455125a/totufarewajutupamel.pdfIn PDF document text
    • http://talleresjpg.es/img/file/papikexomedowobagedilabak.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e4fa0c32e---96889409544.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/juzinexogiban.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/fd496c96ffb49af1dd2abf22b1889b61/11896723708.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/jofavodejevozajazot.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/gejerad.pdfIn PDF document text
    • http://marsalanoleggio.it/userfiles/files/fijuxotewojoliveve.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/3aa5bcbd3c3426899d997628a52705f3/gotutekexike.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/bisujizubonarofirob.pdfIn PDF document text
    • http://funperm.ru/content/file/nitusubevelujaxuxuloje.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/meftfoopeims61do142o51veii/22514635233.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/13943785659.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/vuzor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=marriage+biodata+template+psd+free+downloadPDF 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_off000114cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CD 16976 bytes
SHA-256: 623cccfbdc4185f53513f0d1b10c7545be50b787020f1a653654c347a642c0a3
font_01_sfnt_off000140c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C5 11060 bytes
SHA-256: 8c2376e1fbd89eedaeb164de045a15f1e7f579567df11ced31cbd42aae8acfb5
font_02_sfnt_off00015a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1