Malicious PDF — malware analysis report

Static analysis result for SHA-256 70df13c83bab1d3e…

MALICIOUS

PDF

93.7 KB Created: 2021-06-30 04:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 59a495a6b1b9c0b1ab29158f602af687 SHA-1: 4810a08b2be795cffa77741ba7b482ee43dbff4f SHA-256: 70df13c83bab1d3e6c2d367279e61a590717a6846fc6560f767e2366d294e366
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised websites and potentially malicious content. The presence of external URIs and link farms suggests an attempt to redirect users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://philabc.ru/uplcv?utm_term=short+blue+and+purple+hair PDF link annotation
    • http://micronforgacsolo.hu/UserFiles/file/41432202953.pdfIn PDF document text
    • http://teifsepahan.com/files/file/jazule.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/c629769ece14cbe85512591cb0cdd99f/60917498409.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/dbea6c84dbfafc4a2160f6e1e6d34c87/46734002244.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/75223299232.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7680df21a0---wofoluzikidopurujineneme.pdfIn PDF document text
    • http://kalikraft.com/images/file/bolimok.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b17a0eee476---92150822194.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098613de9eaa---6743397152.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beaff066180---kimiwegepovisot.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/puh73rdenjqul8dc9bdedaf276/wigukikidebimurosidu.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1608f67a30b7dc---62461524152.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/dikapaweratufowanowovu.pdfIn PDF document text
    • http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/xanexisutolisopi.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/537d157ef3d3bda233c02bff42499970/bemiwi.pdfIn PDF document text
    • http://matras-devison.com/upload/file/89011644566.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098aa1b75457---70830378437.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072f5607b120---51008728843.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/zaxotititolulukajunoroj.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/viwomopatiwasudewuzevo.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/4723cb653169998a04ebc079ca88ad55/41847446988.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/fukizopivowefanuwet.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096df4b0068f---sidusuwisozolululojizotaf.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/8ea58d88b2fcb65eb940e8c192d3d010/41061946097.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfb1097865---74832217779.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_off00010abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000122d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D1 17344 bytes
SHA-256: 8a9e4783410a877d8f4561e5102647ab5d379a99af3e4b94b070b6391e9ef9d3
font_02_sfnt_off00014ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FF1 10636 bytes
SHA-256: 4508cea1503c75af033e90423c6ba2020b459f21684b75db760c46d2bddd2a66

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