Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9f60d32941613f…

MALICIOUS

PDF

78.5 KB Created: 2021-07-27 20:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 75920f0ff7f0acc8a4121197c6e56abd SHA-1: 35ece97f17cb84e08f6deed2e7888a9a351ae5fc SHA-256: 5e9f60d32941613ff7a1d991d088087e0e9bef24d4f8a16b7a83aa13a490ae07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious destinations.

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://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa95d7f1f86---jibinepobafuwum.pdf In PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/93c1cec1894bdc23987deb096e5981f9/35864528626.pdfIn PDF document text
    • https://onwater.my/uploads/file/posikimikoji.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c93aa51bc3---mibirenaxabuzipupufat.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/zodofazek.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/7c7c763a8e60e47368f6cd4a4c397dbc/bexiresumeturoremepij.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/22921936749.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/70964465881.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082227dc9d1d---zadoginaforowugux.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5e841c47e---5593224396.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/mobewetotaveren.pdfIn PDF document text
    • https://paperland.bg/uploads/file/jifili.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f632cd8106---zerafuxovobijawa.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/50299696093.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d40d4e5aee---77117795773.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/69037077462.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/bamutelopufudew.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/8069760993.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/86754816014.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/d6l22npmjjoe5m3m3fhu02pdl6/20871432765.pdfIn PDF document text
    • http://candientuvibra.com/images/file/lemudomimegelibipatujuge.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/nokogewagotidixin.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a1022f47ba8---95584388179.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=metodo+para+trombone+de+vara+arban+pdfPDF 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_off0000cc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1F 19232 bytes
SHA-256: 1e63e9b68ac0eb85be1b9027c7fa06f4e5acaf9ee03193dc2faaddf7a9536b9c
font_01_sfnt_off0000faf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF4 10552 bytes
SHA-256: 31d8ea1888f5d7902bacddeeb05b58c6afa4feb33a7fe3739de38f2ab46054b3
font_02_sfnt_off000112c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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