Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e749e4acd30e4d…

MALICIOUS

PDF

77.0 KB Created: 2021-09-05 02:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4edbf7552fde25b5e412090d1c111564 SHA-1: 60db6df2d31ea4948451d830c3a257b9b4107ca7 SHA-256: d7e749e4acd30e4df96d808df1c0258090928348075e7da69e7a20e8acae4505
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=mercedes-benz+gla+200+sport+executive+manual PDF link annotation
    • http://escuelasfutbol8.com/docs/files/fibemesidovodawu.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/juroxomufakajav.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/19508945660.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081bcf2d320a---migubumevuku.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/57184489855.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1606e59fdd8c63---10079232546.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/bs85i01u4dc8laijke0v940p45/xanexutesegosamikilen.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160942951e2af1---23290220619.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/0713044854b4f8ec173010d4ac32191e/vowemizaririgajapajodezip.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/ff70863b5bbcdbb50a01f49af048ba8f/womujinorobunusifojepa.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b18cd3cc08e---73977023828.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/45986064631.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/wowev.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/1781768363.pdfIn PDF document text
    • http://bamila.vn/luutru/files/14587110883.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/78907767433.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/zuxomotetuxewaj.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/72376087829.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/25134799323.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/92769304328.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/d7e0bd1f67e39e253ea3280e67378867/rorudutis.pdfIn PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/faxenidixipojigemu.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/88157374291.pdfIn PDF document text
    • http://davcpundri.com/css/file/poporigalovodesam.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_off0000c41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41A 18180 bytes
SHA-256: 1451bc96a1e004d01ae4cb178c53f8d1f232ce5639c69f175f9597a13d7e4c90
font_01_sfnt_off0000f31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B35 11592 bytes
SHA-256: 764eb8baead983719a135f10c524d9195edd6fcf7e113539319e11d442ebf7ad

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