Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6caef824f753d08…

MALICIOUS

PDF

79.3 KB Created: 2021-06-29 02:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25f2ce68ec7435dee5d5201d38cda628 SHA-1: 46847de33c8f60344d88942dc841aa695d457cd7 SHA-256: d6caef824f753d08c81ec6679babc2fef68390b97b73099a36f4968f009a66ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with PDF-based phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609591afab32f---nedugapeliwatepi.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c60f600139a---47879764031.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/1rjgvm25g76i85iuiu13co0qdc/66950110440.pdf
    • http://antifftech.com/uploadfile/file///2021050113291278.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdecff0690---58263564697.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/708800fad2ebf8f0c2b419b8cf75211c/83117151936.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607042f571188---jofamasonapewulosemojuxo.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160742a2e28cb6---59709524027.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/2qd6b1lc82g8uoo3tvt2timoet/luranupur.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791866583ae---51293386548.pdf
    • http://studiobaliva.eu/userfiles/files/dajukabowolafu.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/ev5k8s2omle26nrunvr2argudu/82965570324.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/c58fe5c636cd8990e14dee5c6bc1d108/gekovizakezisiwe.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96ee307527---51846133076.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/l1f4cdojl4tr6iqq91u8ds2etm/74298757486.pdf
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210615022421.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/9cou663g165o8ujn7cirl2raf6/kasopibeledusavasokowopon.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/be64bb0b46f331b0ef95a2b7d2064514/fajarozomisuje.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/db8d32d34c0ddfdda5435d308fbcfcaa/ribame.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/09601cca4a40342378e47a7799fa5970/daneleginofex.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/cef85209f4b022cce8ca70e053ea6a83/88079686881.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1fffc1173c---revidebakarobodesofeju.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/0fd95ef97d895636055ab274e2403639/67477229033.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=cargo+operations+manual
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d404.bin
60d57d63034d4910d9626f47b26849fe3b8c472c12ea944e32ac2e65e8e2cb35
pdf-font-stream PDF embedded font (sfnt) at offset 0xD404 16728 bytes
font_01_sfnt_off0000ff78.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF78 16792 bytes
font_02_sfnt_off0001178f.bin
446cc26c50ee1ba42a3f368d932719084d5c799d9d0cdb6f7b6792104fb6d178
pdf-font-stream PDF embedded font (sfnt) at offset 0x1178F 10728 bytes