Malicious PDF — malware analysis report

Static analysis result for SHA-256 227987aa5c0303d2…

MALICIOUS

PDF

87.7 KB Created: 2021-09-05 02:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: deedceaa0d52d7e6d69c76a21cdb9f35 SHA-1: de042838aec076c82c407a500a3f382a881d105a SHA-256: 227987aa5c0303d22a2082504a8a0f3e608c4b36deb3d9b3ab27b5c88c13b389
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing trojan. It contains numerous embedded URLs that form a link farm, directing users to potentially compromised websites. The primary purpose appears to be redirecting users to phishing sites, leveraging a common tactic for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pistant.ru/uplcv?utm_term=imagination+creates+reality+neville+goddard+pdf PDF link annotation
    • http://artattack-concerts.de/files/file/70263054473.pdfIn PDF document text
    • http://allycatering.com/userfiles/fogapotel.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/kkdjpt96bp9dqpc4f0lf3ckfb4/97814178023.pdfIn PDF document text
    • http://konyanincigkoftecisi.com/userfiles/file/76480116747.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/872bqlcrh9pvum3ijc2jok7u87/5879630026.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/63724000917.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/temujibevasenin.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/mujuzuvodavuwalegunorubok.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/wakagaxapubijutipedaja.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/3d6a4086263cb3b777f01980ee61355e/91708899837.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/wilofalalodosekijav.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/dopogewedunal.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/32805290408.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/degexowidu.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/79487716698.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093d282c2429---memom.pdfIn PDF document text
    • http://tara77.com/clients/46590/File/84028346745.pdfIn PDF document text
    • http://floridare.ru/app/webroot/img/uploads/file/460908_62837599491.pdfIn PDF document text
    • https://everestart.com/images/stories/file/vavemesarewirenoliku.pdfIn PDF document text
    • http://rockghs1965.com/clients/8/8c/8c68d0bbb6adb8fad5f76254a0516489/File/83748214401.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/fea16b09531974101616c3d142c2b197/xawunumafezibekuzus.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/49061319428.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/pulanapunujisogobedek.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_off0000efcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E6 11096 bytes
SHA-256: cd19280e25a1cd4cc46d5d0c3e82fb0181e4bd248cc88b86a446425b72b65f9b
font_02_sfnt_off0001218e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218E 18092 bytes
SHA-256: 69c4f0899a99b8f9fd05b57fb733d524731f17dd90c73f83cda378a1b9ff86a6

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