Malicious PDF — malware analysis report

Static analysis result for SHA-256 914e97c2790b5968…

MALICIOUS

PDF

82.5 KB Created: 2021-09-23 21:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 94a76c4f885f9ec567f25e7aeccc06d5 SHA-1: 0f752741d347bfb4d43a3c3f560cc9b2c42f8a5b SHA-256: 914e97c2790b596853efa082b653f39d6bebf9468ef18e5e1bf466b882c76aaf
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of phishing and potentially containing a trojan. The document contains numerous links to external sites, many of which are hosted on disposable domains or compromised WordPress installations, suggesting a link farm or distribution network. Crucially, a heuristic identified a 'Clipboard command execution lure,' indicating the document instructs the user to copy and paste content into a command-line interface, a common technique to bypass initial security measures and execute further malicious code. No scripts were extracted, but the overall structure and heuristics point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://drafthe.ru/uplcv?utm_term=snapseed+pc+windows+7 PDF link annotation
    • http://imoroz.by/upload/file/pojegobetoxu.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161453134322a1---tanofosori.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/28836509780.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/97193446567.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/ac7judphl6dd1mslcgsvvgtobd/24510487930.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/25015658864.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/14609950721.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/vupusewesipozedidezekexer.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/71892224248.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/pumajigomevi.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/zolejemufo.pdfIn PDF document text
    • https://keluargamimpi2.com/contents/files/fodebejiduzugisovumigasov.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/zodasefawutaverukodoki.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/maguparajowuzufasewaf.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/vewesumutagu.pdfIn PDF document text
    • http://ned.ru/uploads/files/59875914151.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/xosamofujisulakonenupi.pdfIn PDF document text
    • http://borik.customreal.sk/data/files/duvakiwavirilat.pdfIn PDF document text
    • https://trystsalonri.com/images/file/titubozaxaradere.pdfIn PDF document text
    • http://www.ctmmaximoravenna.com/ckfinder/userfiles/files/2397717769.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/28635369649.pdfIn PDF document text
    • http://volamthienha.top/userfiles/file/sogajelenimu.pdfIn PDF document text
    • http://thaifilmind.com/UserFiles/file/faxogoliwokevi.pdfIn PDF document text
    • https://clicksnepal.grnca.org/img/files/files/rumineraxebisubiw.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ba740ed34---78336521754.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/19111052676.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/79218346563.pdfIn PDF document text
    • http://halanmilk.com/upload/files/wegujomizupupasefisevot.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_off0000dcbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D3 10476 bytes
SHA-256: 57aec50132eb8f8e8486845396effec448ba7d10db73aed88beeea817d436909
font_02_sfnt_off00010cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD2 18184 bytes
SHA-256: c284fc95b52950cb3ff28f593d5135b85e2f7feca6191a402bec936b86d4042e

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