Malicious PDF — malware analysis report

Static analysis result for SHA-256 cedc32f0e55c5099…

MALICIOUS

PDF

86.7 KB Created: 2021-07-20 11:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 91cc1450fd4a8832c5a8eb68fa3e78b8 SHA-1: e72fa0b1719042883794f4d80a56f3af508d204a SHA-256: cedc32f0e55c50993c4a639835a1c51c3f76a6e28907389f18c1171b579e687a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, directing users to numerous potentially compromised or malicious websites hosted on disposable domains. The presence of external URI links and the overall structure suggest an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://nordicaluminium.ru/userfiles/file/98000364017.pdf In PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609268f989d6d---nirifosogopelivujuret.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/ludogagumexosobuke.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/jajogozuwiveturanuwo.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210515143544_cl5zpb.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/26963367200.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/9fut99asmfcvvbtb2gqbe6k5bi/padigitanewamisa.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/raraz.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/af1491a69a42d5b55473fbc86ed8bf12/49317057510.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b41a623fb1---vonusebosadufidazunuxumad.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/42561302655.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/f6dfc8cea0e978929b066b285ac2f15e/3770180829.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e22cc9d1a8aa24bbb40dd517deaf4ebd/gixiwexixububaxajaf.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/24822852006.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4843a0c593---73686487525.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3a20bbc691798780ef66489c372a76c1/depedilenifi.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/xumilepu.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/b9900e19a5ecfa9f02d190e18a5d54dc/mopinep.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210528_141647.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/kakem.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/wikotarin.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57340060362.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/36qi05685nnph2lum7q4d32mf3/goxusolurako.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/6f81f29ba97e1be9435a39d5bbb040a3/32934044888.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=unless+you+make+the+unconscious+consciousPDF link annotation
    • 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_off0000ef14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001072b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072B 10708 bytes
SHA-256: 14af432085ccddc99af71b6373f46a333146aa1bc4f5265de099a506e2f94818
font_02_sfnt_off00011f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9D 16812 bytes
SHA-256: d088a6ef38816f0f3a9574e5f072c512bbde09ac49273104a0788304eb15264e

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