Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc4c621e32b98ed…

MALICIOUS

PDF

81.6 KB Created: 2021-09-14 12:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: db632aec4b5154fe27629c9ae2b775d2 SHA-1: a5fd1d1e39167cc3d42cadf9644ad7c0b117c02a SHA-256: 1cc4c621e32b98ed9ca0d2a29a33999971024c9fd456fcce7948c855cf162d7d
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and numerous URLs, many pointing to compromised websites or link farms designed to obscure the ultimate destination. The heuristics indicate the PDF is acting as a link farm, likely to distribute phishing content or malware. The embedded JavaScript may be used to facilitate exploitation or redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=dolch+words+pdf PDF link annotation
    • http://degrossier.nl/uploads/file/69333869759.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/tifiloku.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613127512c97b---40396455418.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/nemixoga.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/53566230723.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/waxakutulovakavikonefuze.pdfIn PDF document text
    • http://mos-craciun-inchiriere.ro/fckfiles/file/86448731451.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/rumifokomebomuso.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1612e99e6989a1---bumowuwexexi.pdfIn PDF document text
    • http://prograsifkalip.com/files/8292925288.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210911130208302.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/zunavunonulazilop.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/xurimanawolejolazubabenol.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-12/20210912171124661653.pdfIn PDF document text
    • http://patrickstaxi.fr/userfiles/file/gojuluvefajezag.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/19541947620.pdfIn PDF document text
    • http://ipcmanpower.com/admin/style/images/userfiles/file/gakuridumaxawifu.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/fotidefosenelulufebuduxo.pdfIn PDF document text
    • http://ls12368.com/userfiles/file/tilagumilabovegowiru.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16138a575f29d5---92424227229.pdfIn PDF document text
    • https://munis-roquesalbes.cat/demo/vilalba/imatges/file/61609952800.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/85519120490.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/pixetegab.pdfIn PDF document text
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/pasazar.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_off0000db2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33D 17912 bytes
SHA-256: 2ba4d9029f90e17812fc9e5073852e62cfc56ebbd20b7d3c7ca057018d6c6bd1
font_02_sfnt_off000121ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AE 10216 bytes
SHA-256: 70db68424bdb6a45f6f4661bd91e5492151782fc2d0db3532533acd68b3c143b

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