Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f24591201925d8…

MALICIOUS

PDF

94.8 KB Created: 2021-07-05 23:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1bbb069da4c70172b93a1a644f3b8c55 SHA-1: a10c36e1a4d43aa1a86529601059ecc0c7581240 SHA-256: 79f24591201925d8c9465fd0a5864bb119684c2b9c215d0d28b624d06c2d7520
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://drafthe.ru/uplcv?utm_term=the+most+common+sentences+in+english PDF link annotation
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7b1e7c3db---witawijizedivatamesedi.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a33190eed8---jerokujat.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4bea7bc6f---77142124690.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/bad553aulq3jmnr8qr1v4p6lhr/metoxakexikodegix.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/boramiludokivifewopev.pdfIn PDF document text
    • http://logansport1971.com/clients/4/42/424235dfd0fdcd2d3cc2afd1e16bb83e/File/39056783368.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/ee17e585c531b206587df7cfc8aeee16/6050406724.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089078944b28---78560688276.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/f6f4adc73b34e7ebb794f7d597e090ff/galufinafavejabatuvon.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/59963643690.pdfIn PDF document text
    • http://statenbracy.com/clients/d/d3/d362857cea7b6c304c7898dd6c6993b3/File/terefeturijar.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ec3151650---kavogitirifipumad.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bbb3bf52b---lareduvulomotekurefesala.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/limapufulabup.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f968240aad---61895769834.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf610552fd---70555541181.pdfIn PDF document text
    • http://czapla-dachy.pl/public/images/fck/file/jarekobi.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/a8934fe93ccd1a59e042233073ad0a0e/retutevomuju.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/24d7b7446c8e9508646f5787e2cae2cb/fixebenakem.pdfIn PDF document text
    • https://alula.com/wp-content/plugins/super-forms/uploads/php/files/de4d31b71e58ff84543615b480ff7c9e/17761314329.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/45995665597.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c931fe3413---rukuzoneb.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1eada4d1a---tedowo.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/29514924254.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/r8crlctedeqmitglhh33iqo3e9/71151863050.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/288f35b860cc8edf25028f8014c12604/nofewawilexi.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_off00011191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000129a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A8 10380 bytes
SHA-256: 981f699e34ee2568bd5acccd68ace48c836636cd65fe0b28f158dbf2e3e01ba8
font_02_sfnt_off000140f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F4 17600 bytes
SHA-256: a7890042c676ff4cfa1ba2c4c78ff24a5c9a480845aea8bcb68cd9262cd45edd

Open this report in the interactive analyzer, or submit your own file for analysis.