Malicious PDF — malware analysis report

Static analysis result for SHA-256 66feef7d3d08eab2…

MALICIOUS

PDF

86.4 KB Created: 2021-08-08 10:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: be6d755dfdaab07f49f6ea604a5fd887 SHA-1: 8e28c7a62c5957f36a87a3f018f9a6b7231c607e SHA-256: 66feef7d3d08eab2f7e7b42a3e702f90b791532b01bf97ab0d4b584fcf14b61b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://cructi.ru/uplcv?utm_term=simple+poll+discord+not+working PDF link annotation
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf010a6a3c6---85976142313.pdfIn PDF document text
    • https://advik.net/userfiles/file/93831298716.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/hg7b3nuc0vihqdk5504dcb2hm0/mujativeruzaniruzo.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b813431ba---dodupejemukofipofax.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/0b0f911734aa5f939a764ec9d12c17e0/22668488091.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/modejasofe.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/51741983222.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/4ae48d6ba1a8aa0bc843c137193e8081/mibozozoxaz.pdfIn PDF document text
    • https://go2germany.ru/files/file/danukutu.pdfIn PDF document text
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/jqh4pvcv9fgjp2tras0nc8ckbs/2974692208.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc32bec8aa4---63144995950.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/kodiboludazone.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/11203238705.pdfIn PDF document text
    • https://faprosid.com/file/98406757607.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/7550631212.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/83884448447.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0c7735496a---64189964910.pdfIn PDF document text
    • http://minhanh.com/files/67750888320.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/8d8b0f61a4cfd7a8d57b9fff3f94717d/mavewazibezusegupepefuz.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/4466200be89f250449a3d0ff127d7b9a/jilekekerifiperififarex.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/nalexon.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/7d893b9bcb3c1b62095b263725dd4a8a/75061816761.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_off0000ee58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 10948 bytes
SHA-256: 9fcde464bc0e7a31cdb943066f20fa824b5518173788fa7a9d2df055c3d015ff
font_01_sfnt_off0001077e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077E 17048 bytes
SHA-256: 09c9fc53939ec642238f43f9364c21bcb746c7426e7987d38893b0db39c747f2
font_02_sfnt_off00013401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13401 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.