Malicious PDF — malware analysis report

Static analysis result for SHA-256 750d0d5cb5cb85de…

MALICIOUS

PDF

78.1 KB Created: 2021-09-13 10:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 46e384a02cfd83d139af587c777b3569 SHA-1: 3e831155137dea0241d1d79b01a0dc92022d9195 SHA-256: 750d0d5cb5cb85de3fb6696a7fafbf958a4b48675ec13aa35a625aeffb285106
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The presence of embedded JavaScript and links to compromised CMS upload storage suggests it is designed to host or redirect to malicious content, likely for phishing or malware distribution. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://fli.edu.mn/ckfinder/userfiles/files/kiwawon.pdf In PDF document text
    • http://zhjpharm.com/upload/files/gowod.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/d4cf612e00463e2aa77a3fd232cb4c33/bozobepijowiduwofuxa.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/fubakasotadovolegapuju.pdfIn PDF document text
    • https://vinaarc.com/app/webroot/files/ckfinder/userfiles/files/jezibonagakabo.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/45493931186.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/0287625bd9f8ae06141ddc2c72e70348/zitejezidilubojubow.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/161315c72d0cc6---2612193098.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/xinalesaj.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/4e7426809f4cb9423b7b90fd43937b13/jawawizeranitug.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/fivebizimedawarasavalij.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/pekilukaluvupabugon.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337b5f427be---seruwekemumu.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/63360424029.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/df3600b8593805f03da930766e54d74e/wupegasobolarewopoza.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/15765803790.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370cd07d5b0---39766837155.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d4c0bbd261---37176767568.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/dejesojewoweg.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/15723530154.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/39331196843.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/xoroba.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/ziwun.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/ruvuravobelimed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=ardab+mutiyaran+full+punjabi+moviePDF link annotation
    • 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_off0000ccc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DB 16896 bytes
SHA-256: c78a7f7e67f32fcc6059e2035bf3bc5ff12a04d64ddc2edf37f52fa3eda016fc
font_02_sfnt_off00011141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11141 11024 bytes
SHA-256: e1fc930b4e0e262fc8250a288f5cce3f5770606ea2d37435d7edcff8f8e195c6

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