Malicious PDF — malware analysis report

Static analysis result for SHA-256 697bd675d3dab060…

MALICIOUS

PDF

72.6 KB Created: 2021-07-08 09:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 606817c822d00eba94783e663b3b982f SHA-1: b83cb14987e6b85e0b39c56c1037ea3f8f952684 SHA-256: 697bd675d3dab060cdb39ecc23373838b6b9f0a115af0197f47beb5a77d3fbe0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, embedding numerous URLs that lead to compromised websites or disposable hosting, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://oniceh.ru/uplcv?utm_term=the+nuchal+translucency PDF link annotation
    • https://bamfieldrental.com/userfiles/file/91535694011.pdfIn PDF document text
    • http://yilip.net/userData/board/file/kemikaboj.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/64ksdhk8voc4lac7ro80jlvmf0/87391823004.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/9a081c3acbb0e7e97ce84f79fc73027a/33315641918.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/sirabufapuworalafe.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/9e26f680add1dbdb103d7bc835ba484a/zatov.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/46158273950.pdfIn PDF document text
    • https://advik.net/userfiles/file/vobutiv.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/9a1f20af7b01a707e406a9760bcbde77/visapivewizamovedavakol.pdfIn PDF document text
    • https://bataretak.com/img/files/file/simiruzodiroledeser.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ceaf4550144---79784206251.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/bau2a0fgmvmi1ifmg5srm5qjd1/70129805401.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a51f7f741---53050530308.pdfIn PDF document text
    • https://autoparkalbanese.it/file/15291425589.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/klt4qsa23nsoukj5mhcouspao9/9656008396.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/vijegisupazadazesojomi.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/6cbfbeda0be37ea58f2ea89345d780b9/mimexidenutiwotemazamit.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0afdece9b7---90848660318.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608572d5a97a8---82267390583.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd5ad58060---92758321350.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/i94qa4ematd2jihv020hub0170/39489945837.pdfIn PDF document text
    • http://hangquangauto.com/files/febebojami.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_off0000be3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE3A 15560 bytes
SHA-256: ec31a53873d72ff3043894b826317d4192073d01d810f70f25c45ecea1ca17a8
font_01_sfnt_off0000e62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE41 10292 bytes
SHA-256: d40951e368dc822ab1bbbf88261d7522eaf61197debaa4bbd79f196f414ad9a0

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