Malicious PDF — malware analysis report

Static analysis result for SHA-256 011e7886a6faa588…

MALICIOUS

PDF

81.1 KB Created: 2021-08-02 14:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b0a309fae3d6cc822ad04722867c734d SHA-1: a3427e9b94b80699d0531b0b5d08dc3888f0bd1a SHA-256: 011e7886a6faa5886392fa939c6aa862119617cd5e265bf95e44b46ae51bc4b3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. These URLs are likely used for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://chcial.ru/uplcv?utm_term=karakomik+filmler+2+deli+indir PDF link annotation
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/p1uorhbu4cdihifc329vvidj01/31392549656.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/1987742073.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d31522ce83---65237335848.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/51528359858.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/1397a9503854e1514588c2a5059c99c9/wotat.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beccffa3976---nusefejupasoku.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812911d0767---jiwerorotu.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089df06149fe---rezogimaxov.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d62be50aff9---jorusesezire.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e81dad2fb---96084171359.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/51374116996.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/8408c2eb0c2223fa7c10ed096275dd89/86551338144.pdfIn PDF document text
    • http://wfhs64coyotes.com/clients/b/bb/bbaa54d3a7800b2058c5658261a6771d/File/lederobomutawafodil.pdfIn PDF document text
    • http://knoxvillecentralhs1966.com/clients/8/8c/8c0a3a1fea337096d337135aeb812fb1/File/859983667.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/wekimomebomera.pdfIn PDF document text
    • https://dcimx.com/files/80105753865.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/696sg5170jp9flqh39in1ro9tv/72289763920.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/40902026181.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/tonaxepuf.pdfIn PDF document text
    • https://cristalensi.com/public/File/84993477829.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2cded2a668cab4aba2bff79993e17875/dezoxebotufunikowu.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/nilasowizerumemasokan.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/1cd3a4db13cd196d41d08aab9a3267d6/birosekapikij.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/6888f8c767d7bc5a514f0bccea873891/wutimunokamisatekodo.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_off0000d76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76F 18768 bytes
SHA-256: f2bfa4fab48a10d78a531f0958510cad15a2282bc7ae7263323494718147abe0
font_01_sfnt_off0001056c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056C 10452 bytes
SHA-256: d530d7e30d001707da1e47b2ae950856f724d2cdd723c765f3d54bba7b95aa9f
font_02_sfnt_off00011d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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