Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba1cfc22ba3ed17…

MALICIOUS

PDF

102.6 KB Created: 2021-07-02 08:34:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7ece7849f17d188bcbcffe161719c93c SHA-1: 12bcbbf2321e1cf0bb8b7da8e1025719103203f1 SHA-256: fba1cfc22ba3ed17aa0e2aca44d76f149ebe228ed05b04cc8b405a1265c27054
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised websites, many of which are hosted on WordPress installations. The presence of these links suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9682

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://philabc.ru/uplcv?utm_term=instrument+used+to+measure+rainfall PDF link annotation
    • http://studiolegalezullo.eu/userfiles/files/movuxinimoxurigezifexof.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c867480e14---46536408706.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/d868c76ce468a37b5b9296a1c00543ef/15069280183.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/8f729c7e1736b2109c3d4b4d91561a02/mudinidabuwivur.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/7q0vaspnvqs649osk5dmu2f12i/60618820989.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8eac70aac---95969865675.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/14984003634.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/cfc1bcb0b798e9c8e17fb2238256a36b/43382843034.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/d9f877e3021872490ac76a9394fd6787/92333608212.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/nelukuwarovululimedapaj.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/ruwonojakatidaloku.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ec8b9242dad8a96e96d27aecfc413cb5/74325213891.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16075e5e66676f---monivelofuzirozokadamida.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/67667404673.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/m60jnf2u7lv7rjs993e8fc59dg/48765292451.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/83394d40ab2351825b69f8f0d6d7d4f8/54025813892.pdfIn PDF document text
    • https://telenovella-bg.com/files/16095914104.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/11629805104.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d6dbd2b3dc8---67810809053.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/fixowuvefarozi.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210528194837.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/japunireligupoxu.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1ee901141---64482844307.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/bobotowawoxawodov.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/tasovijuge.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/eaec4439e52005eb92478c343e74e640/84764712651.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12550 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D67 10568 bytes
SHA-256: 0fa7d6807db117c5ae828891643d55d46117c48fb2e05f354a25478519531aaf
font_02_sfnt_off0001557c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1557C 17116 bytes
SHA-256: 5887c933122d883431bec12ab47b01512bc2414ebb2b9992b93f8f6ab7b358d5
font_03_sfnt_off00018263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18263 2320 bytes
SHA-256: 47096266c78794a4e913a384a1fc009a73fda139a36fd1c77c68930dfd001730

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