Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b74eed18f2501fa…

MALICIOUS

PDF

82.4 KB Created: 2021-09-05 23:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 48da1f5ab19a159de4f91da2d32a45b5 SHA-1: 7b53fd5d573fea184c4b69355645e8d4663cf7aa SHA-256: 6b74eed18f2501fad5fbe283fcc5fb6dcc1e22552334df2f038646f627779b65
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, and detected by ClamAV as a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://cructi.ru/uplcv?utm_term=altium+designer+15+tutorial+pdf PDF link annotation
    • http://atsolution.org/userfiles/file/20210827153515207803343.pdfIn PDF document text
    • https://qpshouse.com/upload/image/file/7241496263.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bdb953a13---17523755987.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45890a9ab5---54328093395.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/52700415436.pdfIn PDF document text
    • https://promtong.com/promtong/temp/file/36774135698.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/zumuwexuxufug.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16102f93084361---povujekimewapesuguxalaru.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608342423e305---54613181992.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/rubowomelemi.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/fazumu.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/tobelepofekivadatimerutuw.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ah02mbob8ve785inhigffeh8rr/bagideja.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/tebimojigiw.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/68493500076.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097380fb87c6---pavunokujumilisupala.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/43553987481.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/kutome.pdfIn PDF document text
    • https://ooobelkom.ru/ckfinder/userfiles/files/82652141014.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/45231810850.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160cefd033964f---milanajipi.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_off0000dcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E8 17368 bytes
SHA-256: 7f3c8cdc42f6821075cd82b37d5cf1992cb77edabc39a47d5a53e6bc4ebb10e2
font_02_sfnt_off000121f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F2 11108 bytes
SHA-256: 1ba7e9a7655b2743cee45c6578f58e8cfa97aa6e9e5149f8afa1a81d606d7982

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