Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee0b1623add072d…

MALICIOUS

PDF

84.2 KB Created: 2021-09-17 09:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 480738fe4960db7dc0d5d31c235ad62e SHA-1: ef8e55ece007ff212ec0d6e497f5c9ffc5e9eff5 SHA-256: 2ee0b1623add072d74abbca2e6f12bb8ec12e4d998677631359fd84bdd20d347
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the nature of the heuristics indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nomylo.ru/uplcv?utm_term=gta+5+money+cheats+xbox+360 PDF link annotation
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a31fd4749---82098102853.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/54338382786.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/54634533844.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/25284494077.pdfIn PDF document text
    • http://wmasgroup.com/userfiles/file/2839307575.pdfIn PDF document text
    • https://baglab.pl/galeria/file/depofezod.pdfIn PDF document text
    • http://whatdwellswithin.com/file/61235254106.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/toxixebevosudixejuvonop.pdfIn PDF document text
    • https://stopserv.ru/files/file/ninibex.pdfIn PDF document text
    • http://bibonatura.hu/ckfinder/userfiles/files/86848323781.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/jivevojijerikosonoraf.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/44959335776.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/32906584691.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/43922748514.pdfIn PDF document text
    • https://tomas-music.com/contents/files/lawabigizufakukijeboxis.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/91939111616.pdfIn PDF document text
    • http://www.superior-inkjet.com/login/ckfinder/userfiles/files/28226704716.pdfIn PDF document text
    • https://fotokeramika.bg/userfiles/file/3121411101.pdfIn PDF document text
    • https://mi-stores.com/basketballtotaal/images/editor/file/68050356478.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/nidil.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/89689083072.pdfIn PDF document text
    • https://graphicart.ro/fckfiles/file/tubesowu.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/24880418922.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161430ddbdf907---67026843075.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_off0000e380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE380 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB92 17472 bytes
SHA-256: 9349a19d30d3de49c55dff0e581908d978c30b77ca23e082257769ab82ec2fb9
font_02_sfnt_off0001289b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289B 11248 bytes
SHA-256: 1c567169fd7316f06b9261a6c44c48e38aa33f6c2ae3ef8bbc2d8b395b8d2efe

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