Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75f544eb28001cc…

MALICIOUS

PDF

93.3 KB Created: 2021-09-14 09:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3e75250a094366380406461498719b87 SHA-1: 3f6ff2e0200da7ddc103c77b9d555a4a796b94c6 SHA-256: e75f544eb28001cc86b2ea74ac63c07d2ccabc64de413f49556c6c2a562bca92
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a 'clipboard command execution lure', instructing the user to copy and paste content into a shell, which is a common technique for executing malicious commands. The document also hosts numerous links on potentially compromised or disposable domains, suggesting it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://toananhmedical.com/uploads/files/20289831521.pdf In PDF document text
    • http://hlqh.net/userfiles/file/20210912081337_764980261.pdfIn PDF document text
    • http://0048.pl/48files/file/xetagowekofejixigowibi.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/tefuxoz.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4bc5ec9c9---lunipejowiraji.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/ranofunot.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16130b3537e23d---20450622859.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210914_1B105155B8F3179A.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/91511426189.pdfIn PDF document text
    • http://soc-in.com/data/media/files/9316192310.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/demaposijenidelobabuf.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377c6dabf14---varunegoxipazavifopaja.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5e928f9b2---jimubav.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/gosadiparozajigog.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/1168604936612f906de390a.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/15991038838.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a433b66f0e---kixojimokakivotiful.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/d355cdf8809df2fb2849e1f75ac240fc.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/coj3rk6ss7cu0gascdf54gh12d/65030868503.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/xewofojorigolexawupokok.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/jowiketumejowokasep.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/nujofudizo.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/lozaluvaxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=speed+post+price+in+indiaPDF 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_off00010669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10669 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7B 18628 bytes
SHA-256: 265c58569e581140df2a6290299f397d6781a9ccba12673d6800c19fd953902e
font_02_sfnt_off00014fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FD3 10536 bytes
SHA-256: 112f62ce7780cd4d7a68b6fd6836fa227902ab053d1b8d0f25e5eb5216dbe85e

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