Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0f0cc85083d9bd…

MALICIOUS

PDF

82.4 KB Created: 2021-07-14 02:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e2e0042b787a4171048935358f1f0a90 SHA-1: 5a2a26708a763f379401871ce2de16ecc1908634 SHA-256: 6a0f0cc85083d9bd26c795c97b07065a80bc3346ac18bdce1908fdb9443a96db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. It contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF's structure and embedded links indicate it's likely part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://sugarfree-gelato.com/upload/file/10930036983.pdf In PDF document text
    • https://pilisilovaskert.hu/ckfinder/userfiles/files/4116010538.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/13025832021.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/98821182159.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/nugunepov.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/49b96900ecdfb1d6b9ac7400ef6420ff/tixadisabijogoximojobovuf.pdfIn PDF document text
    • https://harom.ro/files/file/sufazekidewuritapepa.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/44087417956.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/c8ec8ee8999c4a1deca9017df7e13df0/bowunenasavazobejeroruvi.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/8f82463e40c74957d5bc0bfbf3421487/teroruxuladufi.pdfIn PDF document text
    • http://greenbrier101.com/userimages/57720540582.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20215141651273795.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/c93d5228f453db5bb43106ea4781bf12/24387419095.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0d284703e---zatirebupimipe.pdfIn PDF document text
    • https://toocapen.com/files/vowawosogabufe.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/hj0mgei0icjas6439kggfhgn3v/nemufuwutobamavow.pdfIn PDF document text
    • http://beiks.info/public/file/xojopefifiwepetavunepez.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/6af5cf2c91dd833b1b01461944ebec90/10498358220.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/xipisudazamatep.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/dugitafafefoz.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/58693867061.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=the+manufacture+of+madness+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_off0000e07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07B 16596 bytes
SHA-256: ffc8900b6322abefdfeab715ac6110091d1912c09ead1125e821e5491343bd88
font_01_sfnt_off00010b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B95 10808 bytes
SHA-256: 05c78b6d8b7b38a1b61081836b542e8e49d3de4942baf58f29a1406d8f059b59
font_02_sfnt_off00012450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12450 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1