Malicious PDF — malware analysis report

Static analysis result for SHA-256 58066d642b41f577…

MALICIOUS

PDF

68.8 KB Created: 2021-09-29 01:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 667151891c0a6f8f1a5f0c1f54135fb9 SHA-1: 78dc2520e7e143e392ca91860ebe15d83eac4463 SHA-256: 58066d642b41f5776168eed5bd4a418f1909c79b3a3ff15c3bc37b46c284ee29
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and multiple external URIs, suggesting an attempt to redirect the user to malicious websites. The document's structure and content indicate it's designed to deceive users into clicking links, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=heroes+of+might+and+magic+3+android+2019 PDF link annotation
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/78723688399.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/93400972751.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/31090438866.pdfIn PDF document text
    • http://captainkillmite.com/uploads/files/202109140927402897.pdfIn PDF document text
    • https://harmony.im/userfiles/file/3050673088.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b3a9b1aef4---rabem.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/94187003330.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/69791751877.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/50893712413.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/96431034200.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/74954816137.pdfIn PDF document text
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/punifuvokedurosazada.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/42045722728.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/noxegiludevekodubu.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/15230384727.pdfIn PDF document text
    • http://ymmicro.com/files/files/bopiwobilozuli.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/29390982764.pdfIn PDF document text
    • http://quimis.org/js/ckfinder/userfiles/files/5766340708.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/jesogukov.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/65063342256.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/sevobenafeporinel.pdfIn PDF document text
    • https://emotionalgift.youngzonejewelry.com/ckfinder/userfiles/files/nelokuxilibarugoge.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/11765231946.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
stream_002_off0000ad0d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAD0D 11504 bytes
SHA-256: 66ee1607e7dc2ec7c6d8d770dc42b08b70aa9e83d07b3c7c4dd45be4bb71e9f6
font_01_sfnt_off0000c803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC803 14332 bytes
SHA-256: e4db2713088134c1bc30081732f1e2d4ab8a7372206c5e67c3b1e924feb936cb
font_02_sfnt_off0000eb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1