Malicious PDF — malware analysis report

Static analysis result for SHA-256 abbe619201a464f9…

MALICIOUS

PDF

88.0 KB Created: 2021-09-07 18:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2d5035c9e7a5979943bd2bcaf8492352 SHA-1: 530be6615c99c85e2140b9c0d34214e25e1c50df SHA-256: abbe619201a464f90c4e20115dd21791ad8c13a15463afc92e8999067cca0cf3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of links, many pointing to compromised WordPress sites and disposable hosting, suggesting it's designed to redirect users to malicious content. The presence of external URI links and the 'link farm' heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://medvor.ru/uplcv?utm_term=stationary+waves+pdf+download PDF link annotation
    • http://xaydungphongphu.com/uploads/files/42408974389.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/hlf8ashatq773jsn63qrhi9p68/51969855931.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/32772630654.pdfIn PDF document text
    • http://pitafest.com/clients/1/13/1337b7689af00ddd847345d48bd720ff/File/ninuzonuxibasutokeno.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/17519275636.pdfIn PDF document text
    • https://nk-sostanj.si/files/file/66888658050.pdfIn PDF document text
    • http://hkacca.com/userfiles/negasemigumatubad.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/mofoferunejibusosujisuli.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/36093945248.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/69279692435.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/sakewum.pdfIn PDF document text
    • https://bselink.com/userfiles/file/30335176268.pdfIn PDF document text
    • http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/bakimajurak.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/pnlbjlusc1vib4fttda56btr83/15635361875.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cabc34daaa---kaxapusorimopimuxeduw.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160fdede5ad0f9---motadoxedapexebiduteja.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/94799293635.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/35afafe31be063700586580406298cc5/74288199647.pdfIn PDF document text
    • http://gdgom.com/upload/file/210826174935488732ramnnzggtpjk.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/44210123525.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/efj1h2pe2f60evffhjvgh4nc05/panugero.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160701ff2b32c9---bokowabarudunigupikabowu.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/97176574393.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_off0000edea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FC 19372 bytes
SHA-256: d06185c927fa279469d176d9391e4d2d24bc2bc86788e742a5ab131ce81e7f47
font_02_sfnt_off00013958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13958 10832 bytes
SHA-256: b2821cd6521f8ad6d9e767657f8fc4fec3baf61f23c946a010749d958f739cc1

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