Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b74bf928b6dbbdf…

MALICIOUS

PDF

81.1 KB Created: 2021-09-21 01:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: c7f222cc0672688a30e2b7e4e9403de9 SHA-1: 5365edcce17a3f0c724f1cdd3524ae4fd2cf2024 SHA-256: 3b74bf928b6dbbdfb3503df102666dc6291610ceeb1f0d0a37dc0ca05f6102a2
164 Risk Score

Malware Insights

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

The PDF contains an embedded JavaScript stream and numerous links to external sites, many of which are hosted on disposable domains or compromised CMS uploads. The URL 'https://pistant.ru/uplcv?utm_term=download+ninja+heroes+reborn+apk' suggests a lure to download a game, which is a common phishing tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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=download+ninja+heroes+reborn+apk PDF link annotation
    • http://rosniyom.com/userfiles/files/midaxojajotopatib.pdfIn PDF document text
    • http://fittbikese.hu/files/file/venaxikumalagole.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/50991462958.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/8545759290.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdeeba85b1---xorolopupozefifaxofabapun.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/biger.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f495fdb19c---bovizezuxozapibot.pdfIn PDF document text
    • http://fibertechnique.com/tmp/file/27423534444.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/69480143743.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/94c91a43820e1425b85fa83ed4cd9ed8/wudenesil.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/77609026928.pdfIn PDF document text
    • http://c-amc.com/upload/files/bunogiburulelosupovadaz.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138a2ebcf79d---pivizunowi.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/88312014094.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/buwabewurudukizenujubili.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/21382160725.pdfIn PDF document text
    • http://beverleyannes.net/home/beverley/public_html/ckfinder/userfiles/files/vafabobubulaladedorawepur.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/lamukafomidolazalare.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/pifilunuvopezisinopunuj.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/tibutogopolupavamol.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/vfo1eho8fsiafd8ov46qca1pg2/dogowot.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210904_223508.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/76666115417.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/45373827575.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/dodowakelunu.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_off0000d78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA2 10840 bytes
SHA-256: abe21c13e9b7fc209dc2d484bc1337e96e78cc32f8a3fc01a88b1d450d0b27e2
font_02_sfnt_off00010847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10847 18168 bytes
SHA-256: 93a153199e08d1d2add29f394ebf39a9b9c919a76fa2ac20cf7fb9bc1740d2f3

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