Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3699868305c252c…

MALICIOUS

PDF

84.8 KB Created: 2021-09-02 04:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: de6b290b03f0c2a1ffb94d99985e31b0 SHA-1: 53e6b7f0ab68417576177c32df22bf48d786a2ec SHA-256: e3699868305c252ce8239392f47472c282eb646f0ddaa3f592c3fc01460142e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised websites and disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities to redirect the user. No scripts were extracted, but the structure and URL patterns point towards a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://euroroma-bg.org/files/file/32448591526.pdf In PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c321efcc75e---20633384597.pdfIn PDF document text
    • http://wghsclassof69reunion.com/clients/b/b3/b33699c65747f61a54cd06c2fab73d22/File/zaxezedezekisenipepe.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/sg504l3oni4m6lcan9dav4tsp8/zakog.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/i47ldqsuodkqb7rmmplgek8gf0/3214380234.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/36365891486.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/63651258216.pdfIn PDF document text
    • http://absigorta.com/E/file/85987521836.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/a511e2c4ba64b1e0e97c213a2286b7a5.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/kojuwirukidofa.pdfIn PDF document text
    • http://bscartridge.com/pic/22420153641.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/da13d0f20a32e9dd89dbca00e55f1105/12409046098.pdfIn PDF document text
    • http://clarasonic.com/upload/file/pasiwipufubale.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/pejurimemegerokabivawose.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/9a4a16b10ba8b81b045d7240ec5f7515/pasiwoxozuxonilobo.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071267ba6b15---bonip.pdfIn PDF document text
    • http://idcla.net/upload/files/vuwadikapewekuwufu.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/9ccb01f3cdde6818f5bab613a7414daa/nofazejavuwasexer.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210607184852909198275.pdfIn PDF document text
    • https://pasargadhotelsholding.com/cache/fck_files/file/sidikajeroz.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/maduxesebevomegaxazuko.pdfIn PDF document text
    • https://h1t-url12shio-turbo.com/contents/files/37971341770.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1620920747.pdfIn PDF document text
    • http://d4sontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/valetagoduzulewanale.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/90444409443.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607557bce262c---82522922897.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=types+of+writs+in+administrative+lawPDF 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_off0000e5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B2 10888 bytes
SHA-256: 18e3bfef7217a68a1459975d9a8123823341bbbb0d297973e77963bb769fc1a2
font_01_sfnt_off0000fef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11705 17748 bytes
SHA-256: 4a6a71a9cda37286a868357886829566ea46551f94facab3821ea2a4f1f26f06

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