Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7027c88822e47e…

MALICIOUS

PDF

75.6 KB Created: 2021-06-26 20:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ace3f90ee1f9b6bd7d18d7a8aa1cd3fc SHA-1: 45ed6b9f3e4520ee9383395be8153d1f1adf4a70 SHA-256: 9c7027c88822e47e298202473e6e15677e44b289175509d7539c7e52b9d154c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=abc+missing+letters+worksheet PDF link annotation
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/ge16enpmliuqp991v1ceblmevj/42490605464.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/7d791fdb54b4fa7c810e2f495653deb5/41031683974.pdfIn PDF document text
    • https://trunglamdecor.com/uploads/userfiles/file/29704429105.pdfIn PDF document text
    • http://charivne.info/images/file/bigixekomufumatabu.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/lefenatezunevezosadagoj.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d495e4ce4b---55330390340.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/5a35300c569c183e173bb78771d6c225/14526425861.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/milivukogofigubelilir.pdfIn PDF document text
    • http://poorclarescork.ie/images/11095510917.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/fujaxam.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/26d173bcd587306a384cb40ee0b3e4a1/66142423871.pdfIn PDF document text
    • https://led7.ru/file/32048101676.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/48448785337.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/wopuzasajidijixav.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/risisogawoso.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd65144fd5---bonidejaxabusuwepo.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/jagifefom.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077323ce39f3---39990959751.pdfIn PDF document text
    • http://camonetinternational.com/files/file/feruvakono.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c81697da---bemimisivumoliwiw.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077c67d93e8b---newirotuwavibinoziwuleluv.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4cf0d24a64f7dec3dd39f583a63a50aa/xatogafifozuzegi.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/vmct7klrg4shsn2v5vuvhqv253/54633366757.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/fn4dd7fu0a7no7g8q31m9cndai/86550834091.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/f04d5c26572a6430f8248ca49cd0d9e7/70309100659.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD01 16700 bytes
SHA-256: 94042b717a3385eafb3e845ff89c574e8ec3d62c27f6da3d31ec5ec9d1793db1
font_02_sfnt_off0001086d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086D 10816 bytes
SHA-256: 163acba53c887e50451b667f145f886b6dbc233a6af98ea57e8e1d83e9baccd5

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