Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a04f86092ab21ce…

MALICIOUS

PDF

83.5 KB Created: 2021-07-21 14:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 07bc6fa447525bf060ca22963d2d6157 SHA-1: e96e3ed5d8de684b44b976918835257043a67b33 SHA-256: 1a04f86092ab21ce5bc505e5bf0c609f90cda780b2a470f4b79f60c33c3c1911
156 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to external resources, many of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to potentially harmful content, such as phishing sites or malware downloads.

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 https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b22ef64f9ee---21807341288.pdf In PDF document text
    • https://adamant54.ru/userfiles/files/62759324410.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/98935773896.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701c69dcb43---78642356191.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3ee11be86---pafetofipukowijige.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbca10f6eb---zemekikejules.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7f4a8afb6---15551054287.pdfIn PDF document text
    • https://bdata.vn/upload/files/vafelesamuwisupivutepedi.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/nmp918421c6msqgdh2k1qdb9nq/xedabepeduwavubuwebilatu.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/ed62b160d1c5c0eac8834d6e7b25b657/33046204627.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/zagorutofawi.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/juzoz.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160781a7d893a8---84485632773.pdfIn PDF document text
    • https://siroyensao.com/upload/files/74629319599.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/lusigewazemipirepik.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/04ee73866ed23ddc873c77a21b833878/bibisasowumoxumutakiwegax.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce15fde1b5---bejagogegezajijadipera.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/814223a587b5a4274c8755dbf5fb04fa/98613902817.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/fetegarosagufetafep.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/xapoguno.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/lovifimerad.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/34007038086.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/or3bfp5vhl5tjomvr5h7eaiadm/sureraxanenejosepedo.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/3b91c8fe86c7160ad45c45412f285c45/56708511194.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a473470310c---46074546656.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=video+star+apk+download+androidPDF 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_off0000e365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE365 16680 bytes
SHA-256: 241282216c95db7a9bb9f7a574f8623838cf9d586fb28a6c795bf34643fef2e5
font_01_sfnt_off00010e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7D 10532 bytes
SHA-256: a9f34b637d759a19709bc584e1cdcd29553ba395d77a3d9a1333d0d4a43eccea
font_02_sfnt_off000126ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1