Malicious PDF — malware analysis report

Static analysis result for SHA-256 652054760fea00ca…

MALICIOUS

PDF

68.9 KB Created: 2021-09-27 14:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7e1662e3d056ca3396df823bda8cb10b SHA-1: 112ddef4deb3c4cb587e324a0d45d3a2dccb277b SHA-256: 652054760fea00cac8ec8e50161734887e154e36936e1ccf560e296add009cd8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are hosted on suspicious domains, suggesting a link farm or redirection mechanism. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the conclusion that this PDF is designed to direct users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://fotobolfestmeny.hu/mvc/userfiles/file/jaguwevolotuvitedozis.pdf In PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/76104539097.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/54397650306.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/zimoxerifabepusovawoka.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/digirebetoda.pdfIn PDF document text
    • http://lemonsport.hu/upload/file/2192998864.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/jadunevarabewipununafuno.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/88540874891.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/78534234956.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/pedilaboxamu.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210919063841.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/21604795766.pdfIn PDF document text
    • http://klinok-saintp.ru/files/mufiv.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/vikamezibikilo.pdfIn PDF document text
    • http://imbirimbir.ru/files/31128566244.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614bcae5300b5---59025073411.pdfIn PDF document text
    • http://ydyb.com/filespath/files/20210913201655.pdfIn PDF document text
    • https://luckysurface.itweald.com/uploads/files/6137b4a93fbbe.pdfIn PDF document text
    • http://altinay-law.com/images/file/poruzor.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/minemototivakaw.pdfIn PDF document text
    • http://vip-cond.ru/userfiles/file/16549422646.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/29377608878.pdfIn PDF document text
    • http://trunglamdecor.com/uploads/userfiles/file/nufagijulimumokuzagidox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=the+last+airbender+pdfPDF 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_off0000aead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEAD 10580 bytes
SHA-256: b896e04ebeeae07bd7e20efb23f1b449f45189be61e757d7d5b1c868767fd3c9
font_01_sfnt_off0000c67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67D 15768 bytes
SHA-256: 47a1ccb389e81970f808d40c28bd0dcc8e5a91fd8f1b48f7a5cf5dc6ff5ae3ed
font_02_sfnt_off0000ee7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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