Malicious PDF — malware analysis report

Static analysis result for SHA-256 85361b18600a3d20…

MALICIOUS

PDF

86.2 KB Created: 2021-09-21 14:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2fa00ee468a84e99b7d1e87752d0ab71 SHA-1: 671b8c37d450030decb7ad0b3d9f9617c37a9de4 SHA-256: 85361b18600a3d2023bd5dfb45e9aa5117718df9694431fd802ee692f89fdce2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URLs, many hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

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://pistant.ru/uplcv?utm_term=game+android+yang+support+gamepad PDF link annotation
    • http://tl-maskinfabrik.dk/userfiles/file/mijebujakus.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/bijewidilutenun.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/gipirijifowoxigubowure.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/1a817a07cd1ec74d8a3a06d80490512e/xiditem.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/zeludosanuxel.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/74149377497.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/24769854570.pdfIn PDF document text
    • https://superlitefan.com/uploads/files/vipokuwixodap.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/64018220063.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/52054747365.pdfIn PDF document text
    • https://himalayanespresso.com/espresso_ckfinder/userfiles/files/jikamopugobudi.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/vetutexanupapoxozisepaz.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/zenew.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/vemikekazezonuxebeku.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1613997d735d27---55931429470.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/kezanufapirolujuwopojoke.pdfIn PDF document text
    • http://www.erealitysolutions.com/tennisontario/assets/appsadmin/js/ckfinder/userfiles/files/niduwexudekalew.pdfIn PDF document text
    • https://lazerom.pro/media/file/59616900580.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/buvepikubo.pdfIn PDF document text
    • http://gapp.fr/medias/files/lesexi.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/22634db22f69056f29e6878bb48683bc/13821985093.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/ec45d2e3bfbe8549d672d7c4ecdf20d2/kikalaborik.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/3696841974.pdfIn PDF document text
    • http://sintniklaas.kinderopvangpimpeloentje.be/ckfinder/userfiles/files/bagigifevifeserupub.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_off0000e85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 18764 bytes
SHA-256: 40df48d51b08b5c8c335d2a615e1c7469ebf42ef26f0e09420d591f6eb139d37
font_01_sfnt_off000119b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B5 10940 bytes
SHA-256: 1f058c856765d5f62f25d8cc7ccc908fc4ff4101b07d03742b34b58525bc81e9
font_02_sfnt_off000132dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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