Malicious PDF — malware analysis report

Static analysis result for SHA-256 249dba954f79fc0e…

MALICIOUS

PDF

81.1 KB Created: 2021-09-05 19:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a6c50820263e80ae75fae3a7ff3d4b64 SHA-1: e42a70b62edae2ad25976c9b36c8afddd1a50202 SHA-256: 249dba954f79fc0eab7b3cff202ba7c1368003461aa8c80581eed564c348db36
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains embedded JavaScript and numerous external URIs, including links to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The primary function appears to be a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://inwebjor.ru/uplcv?utm_term=non+conformance+report+construction+pdf PDF link annotation
    • https://ijp2.com/contents/files/pofagupiro.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/lawamidewak.pdfIn PDF document text
    • http://whscardinals1963.com/clients/9/9e/9e5fab02d16e7113a74bdd4e7828f974/File/84302295169.pdfIn PDF document text
    • https://hse.tw/upload/file/tewikaraz.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/9c091b68c5ac9d40138a5811db7f0be7/bibalubotidedoxobur.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/warosovenoda.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/st8hcgdk8qkvegsempaiu1mt3s/49011629434.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/19747338207.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/72824697017.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2f56979b3---raxiwun.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/78221098383.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/34408539776.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/5d74d5e381d3704e0dafc17b7d96e7f2/berofujetukirarukovem.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/11fc73aab1961c4429fcc43614e62be5/pomawegix.pdfIn PDF document text
    • http://firegallery.ru/img/upload/79671032459.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e55531b78b---gatipariza.pdfIn PDF document text
    • http://beta-rc.com/upload/files/81035016609.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856beb5d49e---xufizanadekuxed.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607067c68b109---jubimigizeg.pdfIn PDF document text
    • http://newtrichur.com/userfiles/file/38021586428.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/loparurud.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_off0000d89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89A 10812 bytes
SHA-256: 52dae8860ee2427ebde161241647338b558189c12de9c0bd8924f432e6cbe194
font_01_sfnt_off0000f185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF185 17484 bytes
SHA-256: 97f6a82c14164ea4d18a8886c7476768b54f5a040e11f4b2d62d9c8ec40508c9
font_02_sfnt_off00011e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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