Malicious PDF — malware analysis report

Static analysis result for SHA-256 48584470114a33a9…

MALICIOUS

PDF

82.5 KB Created: 2021-09-19 16:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 84a3bbae869447269c1933c05b80178f SHA-1: 55b6df56ca0bdf793664f2929b62c029b8a8af63 SHA-256: 48584470114a33a94af0b74de973af690dbc11b9f9c98acd1f92aa2ebe0fdc03
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 ML classifiers indicate a high probability of maliciousness. The document contains an embedded JavaScript stream and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content. The presence of JavaScript indicates an attempt to execute code, likely to download further payloads or redirect the user to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://archism.ru/uplcv?utm_term=offline+games+apk+obb PDF link annotation
    • http://energy-labels.com/userfiles/file/52104251430.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f90b39569f---gufopupimezade.pdfIn PDF document text
    • http://ternovykh.ru/content/file/domotarikegos.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/namazojizemezabi.pdfIn PDF document text
    • http://lehnerkom.de/images/uploaded/file/44877608297.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210919111901.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/vavuxelobuzono.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/161444cde285b1---98491480830.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/vevolabefofadivapowawog.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/93327896700.pdfIn PDF document text
    • http://ourconn.com/userfiles/file/202109111132106775.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/72336163604.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/tuxuxuzuzamivu.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0a9b127e3---fosemiwoges.pdfIn PDF document text
    • http://countryclaim.cz/userfiles/file/97878813009.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/93493ad93ddb88f405bc3bba9fa6424b/63318932086.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/nupotegobuwalomerova.pdfIn PDF document text
    • http://cokhilegia.com/upload/files/bivapuvugozebudegu.pdfIn PDF document text
    • https://activepymes.com/pub/file/zifugipomezadixufepija.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/turifal.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/tikejezeji.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/giwadedepebem.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_off0000da03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 10760 bytes
SHA-256: e8d086c8c7e5c489133760485baea8844075fe21c75ce2498f1b22ac58da2b2e
font_02_sfnt_off00010a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A95 19164 bytes
SHA-256: decc791ee151c226cb7048658313c541ceffa896f9ece6ebf13881f9a0fd6623

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