Malicious PDF — malware analysis report

Static analysis result for SHA-256 286968a06c56db03…

MALICIOUS

PDF

80.7 KB Created: 2021-09-04 00:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c90c120673e16a2a66e34815a1659bc1 SHA-1: af500787cbb22b9b4fdec7876fe2039ceb3e9c4e SHA-256: 286968a06c56db03c4ac052dda54e83d08517ac2f700ad68743ca08932ac7418
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Several heuristics identified the document as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting. These links likely serve as a lure to phishing sites or malware distribution points.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a599a2dfe---zojaguvuxotejav.pdf In PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/8r6hsf6u44dp6d6ib71lnsvcic/tabaxuf.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/oc43mj6uqmqkjuohmlidr2u002/bukoxesazivonibiripogoki.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/gezosuzukerimatenowu.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/bejuzijisalavarerefabu.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/e53l8df060j8m39p6ae2e4iam7/wibadebutut.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608534d878ea0---reverulegu.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/5glure17q3hmpebo296k7vhdo4/81271397068.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/9be50d1ddad9e33cbdb031118cb9e643/63539014891.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/65897723299.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/84072578701.pdfIn PDF document text
    • https://vieclamxaydung24h.com/upload/files/jupifomawisuv.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/lalosujimumulunadew.pdfIn PDF document text
    • http://lumieye.com/userData/ebizro_board/file/lepuzegokon.pdfIn PDF document text
    • https://amblamy.ee/upload/file/rodifibilubokigitewaka.pdfIn PDF document text
    • http://indecomavo.pl/inc/3939138593.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160727f4978922---ronerojolanazezitetixe.pdfIn PDF document text
    • http://keigan-productions.com/clients/863431/File/26621700478.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/r4t2eph71r57lr2s5nglqd1m0f/20144936137.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a329074edb---53884806426.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/62408911302.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/38253991998.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/tidubikipawiva.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccd083bf4a---jurepusuvoxesilojuworus.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/10912935584.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=order+of+operations+worksheet+pdf+hardPDF 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_off0000d643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD643 10752 bytes
SHA-256: 8461fbc86d2d446b082b73d6120f14b31f319951b170ca952f30179ab68a13d1
font_01_sfnt_off0000eefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFC 17672 bytes
SHA-256: 3402be31c0000dba253432e0c0a2dbe94ce7a841cc862849055eed3220dbe80c
font_02_sfnt_off00011c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1