Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebaea13432089760…

MALICIOUS

PDF

193.4 KB Created: 2021-09-02 10:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4c263dcfb67bf9a703b328d7c095b9ce SHA-1: 0206a1f6df3908a0667e8df799acd2c25e9567f2 SHA-256: ebaea13432089760fddb954c7669804cd7ee77b78d5fa960660bf07a301d807b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous embedded URLs that point to compromised WordPress uploads and other potentially malicious domains. The ML classifier also assigned a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9528

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://oniceh.ru/uplcv?utm_term=50+lectures+on+jurisprudence+by+rohinton+mehta PDF link annotation
    • https://xn--90ah6akb9e.xn--p1ai/f/file/12008880066.pdfIn PDF document text
    • https://promise-land.com/upload/file/32347327285.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607594783ab05---44855741388.pdfIn PDF document text
    • http://mutitar.com/user_img/files/92123381434.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/2cf0c9ef5a5e3c73f53c67c1bb26fcb6/mogavakutamojifowibukize.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/4801329933.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/41522958635.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/vdi62hc404t771ofn4b6pgqskg/77433619661.pdfIn PDF document text
    • http://orem.mn/uploads/files/52484170905.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cdf798743---26837373144.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/k2f87lb2ooum5e4djdmbbt1qgd/46193463161.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e749d07819---69082500065.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/fefek.pdfIn PDF document text
    • https://phm.vn/upload/files/zekak.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/74137721075.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/dizaperilowowovo.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/pukapa.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/94266042151.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/mubelafugif.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/48dc04fcf97c224d59eb967e6877f591/sopawifojutof.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/76129057006.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/56040888072.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/7e4d6580e51b445529b76b726a518a70/88472993531.pdfIn PDF document text
    • https://mauspro.net/upload/files/43057262572.pdfIn PDF document text
    • http://chinalabware.es/d/files/pogazamewiru.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ade802f333---97081552316.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25ECA 2084 bytes
SHA-256: 7f5bbe9512bc50c372faf73862a878d02b7489371da45bdc22e1b04493f4f730
font_01_sfnt_off00026847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26847 11424 bytes
SHA-256: 010abae190263bebcde8f08b7fe5f97e10b5c43df2c6f859dc3d811e9b73dd52
font_02_sfnt_off000282ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x282CE 26116 bytes
SHA-256: 31c34462baa65abd3f2d482c36fd13ec0208dae56c035cbf76d6d43fc5177dbd
font_03_sfnt_off0002c453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C453 17236 bytes
SHA-256: fcf4fa8ab6a195383f74e301522bc69d0383843dbe98724e13a1d5cca4e98573
font_04_sfnt_off0002de0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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