Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ce992cce2dc4b8…

MALICIOUS

PDF

77.9 KB Created: 2021-09-01 00:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4f2b24bbc3d6750b13af3fa8314a3695 SHA-1: ca4d5b76395fed2eff9fa233a04c3c1199e46849 SHA-256: 12ce992cce2dc4b8fc54c329f122a62464ec3b982f9b44526a490a845dac1c5f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The presence of a PDF_RANDOM_URL_LINK heuristic firing and ClamAV detection as Pdf.Phishing.Trojan suggests a malicious intent to deliver further payloads or conduct phishing. No scripts were extracted, but the structure and URL patterns are strongly indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://garglob.ru/uplcv?utm_term=clans+of+clash+mod PDF link annotation
    • http://ceresasrl.it/userfiles/files/lajulelukorarisavigamo.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073172328c60---xularoletubibapulivupilat.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/wojapanuzunarineluwutasok.pdfIn PDF document text
    • http://growourworld.com/clients/83159/File/fapigorikilupugotavizidi.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/36265317120.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/dibosataj.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xusikazekoxobevukip.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/71aec2385b8168001908f3c1c5fa1e78/xelakerevuvonifede.pdfIn PDF document text
    • http://yalcinsezer.com/upload/ckfinder/files/nijapanalabagowinolewogo.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/jaxapoduzafus.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/xerotuboguv.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66795089580.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/nigajogozagobawofige.pdfIn PDF document text
    • https://nadinerogger.ch/userfiles/files/46603913072.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16086d31439ac6---96103265838.pdfIn PDF document text
    • http://senn1962reunion.com/clients/2/2f/2fc2c703930c5c120d54ce0350dd22c7/File/70281253383.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efc7bef835---powez.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/vedoparakane.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/d0bd1de48115048ff7301028c824d600/gifisejesusixene.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/77381903895.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/84080597594.pdfIn PDF document text
    • http://underbutter.cz/download/foto/sedupowiredijoperoresaso.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd2b64dc2f---73211179725.pdfIn PDF document text
    • http://benefielddarrenfordhicksunited.com/clients/2/21/2186b72972973349411f8b90e6071e14/File/wulugegavajadokuvibaz.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc98ab2a35---11169303195.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE914 10348 bytes
SHA-256: cda9c23071b6c75691af1f271456054ab6c8e1a9e4cff6f46150e9a2161c7024
font_02_sfnt_off0001003a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003A 16172 bytes
SHA-256: 07b80af408321757d5bd7d937334fc98df764d4c095f628c6cb7eb63bc11b16a