Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed602a01d319a76a…

MALICIOUS

PDF

78.9 KB Created: 2021-09-17 04:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a97782c82cef8e29a76df4e5f1de39a6 SHA-1: 38956c7d385f1ea9665337f37557bee2c7c972bf SHA-256: ed602a01d319a76a897f6af370e92b11bebe0a27f52bb5102316ecd0cb8fda2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

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://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/4e8e1e5622e9ceec5f4f095613a37270/nibawusipeririwepu.pdf In PDF document text
    • http://brava-ekb.ru/userfiles/file/favojugibelad.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/ed44ed3fb2b8c8a1bdfdb7308f392bff/vefubesodepaferusudup.pdfIn PDF document text
    • http://defhjdrjioo.friend-match.com/upload/files/76791067639.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/6449705803.pdfIn PDF document text
    • https://asiastudy.in/ckfinder/userfiles/files/57086271809.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/lojoxelirewas.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/2601fa9143473ebe4e4516c9cf487c25/56110346413.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613baab3b6fd9---70656836997.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/77988264124.pdfIn PDF document text
    • https://ms2gacor.com/contents/files/93934519154.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613bee9360482---tamizobikimuguvonukini.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b3afb8d4c---sulimu.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/bagati.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/22390187789.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/gokidukewoxetagaxejedul.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/nenol.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/43446892500.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613878e8aed29---limutolawikazivan.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/24087482526.pdfIn PDF document text
    • http://changjiujz.com/uploads/files/202109120724242008.pdfIn PDF document text
    • https://melz-feu.ru/upload/84865398841.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///4981256848.pdfIn PDF document text
    • http://firesecurity.sk/userfiles/file/japivinogalew.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/finisinozefepifud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=the+last+of+us+gunPDF 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_off0000d2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF7 10364 bytes
SHA-256: 1a21baee60737b71a6da46abb731ae11c8ff374d4c3ba19efeac0b756d1a787c
font_02_sfnt_off00010269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10269 16912 bytes
SHA-256: e166b18c61f589e8a51f904bc1c804dc1e750391b3f4d6f27f8483c2ee1b3b82

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