Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8703d2e2e62305…

MALICIOUS

PDF

80.4 KB Created: 2021-09-06 10:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 98336dda79a497040c6c56d78fd2b847 SHA-1: 12f7baa13fa0b825f2df02e1d28d425224984e8f SHA-256: 4e8703d2e2e623053a4f3bf4c1da13bf649c52a4e60cfb7da045242ad225d105
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics point towards a malicious PDF designed to redirect users to potentially harmful content.

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://chcial.ru/uplcv?utm_term=bigneat+ductless+fume+hood+manual PDF link annotation
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160c46a02beabf---setesowesu.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/17702378710.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/gibodolib.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/f4956f64b6694d0b74a9b0412e248e46/mupun.pdfIn PDF document text
    • https://questyme.com/userfiles/file/81434153349.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/fntbrkk5fu1s4mmlggnp0ueskc/luzofofiwekujarasozipixov.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vivelojanaked.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/31767173269.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ae3ikfs89jv05ei0oll741vf88/zarewimigugilodedidizunu.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/e88d9ec0380ce2022c648d15f5cf21db/20131222994.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/44dff0c56c0ddddbd37acdb067e1d8ba/vipopogaxonutip.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d99af22ef7---pigilerobifejupuwewixawe.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/6028813129.pdfIn PDF document text
    • http://toflight.mobi/attachment/ckeditor/files/26d800d77c9d9c8da1524a8400fae7c9.pdfIn PDF document text
    • http://sportsclinicwest.ie/media/contents/file/17397097365.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b70641b10---vowenu.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/9e83ebaf0289b8662703f66f9428836b/dupobebenifo.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/94608540217.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/wuxifodomaboba.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/49397357565.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf53e95ab4---52391103987.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/tuluminu.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/dulopepenomo.pdfIn PDF document text
    • http://thejosephinebryantfamily.com/clients/48776/File/99253197112.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ob5jmrgjg5egrnv77du54v0m56/74403671097.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD373 18584 bytes
SHA-256: 7095c7ac5f9a2c723930fc9feb76d65fb6cf4bea289612b8648abdcd4c40f1ac
font_01_sfnt_off000102d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D7 10976 bytes
SHA-256: c0364faaf54035198c80a19e10aca819cbd97eae451e554bca0c391b4116d8c6
font_02_sfnt_off00011bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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