Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee6d45d3606b1ff…

MALICIOUS

PDF

86.5 KB Created: 2021-06-27 22:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a2b347c97fe824a7d2450572165bab22 SHA-1: c4ee12d500b9d97c85f7bd733dedb2bce5ce75ea SHA-256: 7ee6d45d3606b1ff1db995b7e68582578966fd1e183679b9261bb7b873a65206
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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
  • 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://cructi.ru/uplcv?utm_term=2k20+special+offer+vc PDF link annotation
    • http://medicaldistri.com/ckfinder_files/files/zuxonimenibujuwudapebus.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c513d576070---73278845786.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/ronipewepazemikolibe.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/428b048b4d8b97a21ef083546c3dedb6/jonodotitun.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/a8bb3fe83f88615e0ebb7abdc1584a14/nezelabaluvosibizobuget.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/67jn1nu3m0sj7apvf2d1a4o2cb/libufujiraboxov.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071858b699fa---tibobotuwiturujovufi.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caf8c194fab---fezevoretivufabivif.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b0f6cb73d---13772573691.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/gesodunofazaturo.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c41590d4640---6186714208.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/b52ba54fd763ffe9ad5ac979d11f8b7f/vudenolitovisusozogifo.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c7b16714---vebimiriwoxopanan.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/11781669513.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608609720a1f2---dufodaditiwuwitubux.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/razevifen.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab72df2dc0f---nenijuz.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/6803875134.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/dntsdeotf3rpbh4gg5s37im9t2/gopubijasutipezojos.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b203fa96fac---vanukasuloxufumo.pdfIn PDF document text
    • http://quatang3t.com/upload/files/14304991696.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c10b17325---tijewekujogewotugax.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 10576 bytes
SHA-256: 0c8011d69c0ca47edc85218498f86e47313e204e2ed739530354f2185bec3eaf
font_02_sfnt_off0001060b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060B 17540 bytes
SHA-256: 8a45c6a846076b103210ecfb33568ed18ce3d980e48a3e92b064352a34964bac
font_03_sfnt_off00013436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13436 16720 bytes
SHA-256: 0a3b90e07b999bc651bbda7d60ccef4749ee32b63dddb4fa88172804acff5db8

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