Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d19c52ea6d429ab…

MALICIOUS

PDF

75.8 KB Created: 2021-09-09 18:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a17d7ebe951c654ede0e1aa4c9527b41 SHA-1: b45485bc84955f4cd3ae17e06a7797f594bfeb67 SHA-256: 2d19c52ea6d429ab4f7dab9fe13a5e9b4c83b4c0381d379cdcf38da7b4532223
174 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically indicating phishing and trojan characteristics. Heuristics identified the document as a link farm and a lure for a password-protected archive, suggesting it's designed to trick users into downloading a payload. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious download attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kitapkaplama.com/upload/ckfinder/files/rawepefisuzuli.pdf In PDF document text
    • http://driver-jazda.pl/upload/file/33998453614.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109081229125072.pdfIn PDF document text
    • http://osingenieria.com/images/admin/file/pezujugafevute.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/29979388276.pdfIn PDF document text
    • http://strandedtattoo.net/file/27130246257.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/zoxurokowawesivu.pdfIn PDF document text
    • https://krossi.ru/images/content/files/4791330563.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/161315e3e83db4---96653988871.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/17001487329.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/21186904080.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/10a8d2aef676705e83738d6ded6cc7a4/36592534866.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/nudizikusedajugixafepu.pdfIn PDF document text
    • https://gsm.company/ckfinder/userfiles/files/4496021213.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/wulox.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/jeromem.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/dekolatilibalenizexuz.pdfIn PDF document text
    • http://ebus.cn/up_file/file/zubusone.pdfIn PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/popibege.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/pavojixudekewinasaki.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/40723653418.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/liwupigoso.pdfIn PDF document text
    • https://cosmeticdermatologymiamibeach.com/uploads/data/files/13822522543.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/wadafi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=pubg+mobile+obb+highly+compressedPDF 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_off0000c2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A0 17612 bytes
SHA-256: b6d23de447df3a12d61e43f1b2574723b5720532ed0c840a3d5210e7c0de8cc7
font_01_sfnt_off0000f05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10875 10952 bytes
SHA-256: 1433522aa4d3f95df3158f3bc6b0c097bf7367733dfef633790278af31bfef67