Malicious PDF — malware analysis report

Static analysis result for SHA-256 12422a03bbe879fb…

MALICIOUS

PDF

81.6 KB Created: 2021-08-03 07:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a30cf301e2348dbbb04ac043006d3e9b SHA-1: 1e9e28228105c8a74d63d89c9f1677997ecb1179 SHA-256: 12422a03bbe879fb21c75f096bea721f7af135d310dcdee4cefa886fd644e60a
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these compromised hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/b19d8c653073a85c2559034fdb2f88a8/jazivigawonujedan.pdf In PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/r01lj08fi2b0v7au71inc1v5i7/zatefadisofulenudowari.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/18360022105.pdfIn PDF document text
    • http://e-hematologica.pl/users//file/63150288750.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160837b1c69d46---peduwaxezadujisejidu.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/11148312615.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/91631279989.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/dopebimegezetix.pdfIn PDF document text
    • http://calisnt.com/uploads/files/donosarufojo.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609879d38be35---fimixilifa.pdfIn PDF document text
    • http://shophouse.info/images/files/29491504992.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072916492460---manutuzolegotid.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/12183b2e68385433292ec5270da16bc3/jusenevuf.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/1t0l4lcud8of4rcpnvseq629fm/70411259842.pdfIn PDF document text
    • http://web68s.com/upload/files/nofevufipakububib.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/26667587489.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/85725299956.pdfIn PDF document text
    • https://gangnampools.com/contents//files/fupodedin.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/fb9767cc9cd79f5e3dc3c224cd8f6e2b/lanej.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/liwelepakone.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/19426280174.pdfIn PDF document text
    • http://thongthien.vn/upload/files/govibaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=2019+kpss+matematik+soru+ve+%C3%A7%C3%B6z%C3%BCmleriPDF 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_off0000d30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30C 18976 bytes
SHA-256: 9c821a05c2b82dd3d892fb4dfcc7ed90fe51061fa7681c764099eda26e245847
font_01_sfnt_off00010264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10264 11596 bytes
SHA-256: 06111321d0500336d2254f040fdcd4bc254d872f26bee521631271863d09b0b7
font_02_sfnt_off00011d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1