Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a77cf3676086a5c…

MALICIOUS

PDF

72.1 KB Created: 2021-07-01 16:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 127f4f147b4ba03f1f16e8714d951ba0 SHA-1: b83994d014f04525b7b2d99778469c3f3a74ad0e SHA-256: 2a77cf3676086a5cc141308fd9f221f7f07fcd316b8056cf1d37fbab4fc81922
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised CMS uploads. The primary purpose seems to be directing users to potentially malicious content hosted on these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://cuisinescartier.ca/upload/editor/file/5906673849.pdf In PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/9f958787406f7ebf5b1bd336a8ae59b3/tewegikuzanironejoruriz.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160791329ccb74---lanonumaguli.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210605144803_1328840245.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/0ba6612b6b15900fc3a4fc362e61be59/19889729235.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/12778710743.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/94896178169.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/24516604053.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/fobivuguvaxu.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e72bc86854---77382234821.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/31836522075.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/eomccpnj66rsb3s80m9bnqsf0j/kenafunezimuz.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/e364161c1a5c803da02d8ab9f016fd43/wekex.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/wolenunivagivizemol.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3804dc36c0---45902848840.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/l4hvm7ha8vmov1hpo29aol84h7/saxijakemixegogone.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78c1be616b---vaweraze.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb4d612354---sezewike.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/pdpfg8cot58geu76c22il118om/kalagola.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/vulajipawata.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/s0rqfd2onsca4v9kcbk5trjf26/rujakosunobabike.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/zumikiga.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/fumijinojuxugexoveteliwef.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/7f447bd4a1ccee1857c5a60649fa6978/67114374269.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=bring+up+a+dictionaryPDF 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_off0000ba05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD217 16160 bytes
SHA-256: 9d916fd1558ce9a1f9a496c2b47b88ab8e06954f85677fde020d73baea8d8adb
font_02_sfnt_off0000fafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFB 10608 bytes
SHA-256: 0af4da345610b79a98ceaf56384691327c3bcb33e681dce43df8435ec80256ed

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