Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6d2a14b29b5218…

MALICIOUS

PDF

86.7 KB Created: 2021-09-17 08:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 378c833c9b35885e3c42b54cd8171331 SHA-1: 32c590846414bcc3ce8115eae411f6c0a29c98b6 SHA-256: bd6d2a14b29b5218728db54271216951c3b3c4bc7ea05bae715af83788a8b05e
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and instructs the user to copy and paste content into a command-line context, likely to execute a second-stage payload. The document also utilizes a link farm strategy with numerous distinct hosts, suggesting an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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
  • 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.
  • 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://a-pointpro.com/cms/ckfinder/userfiles/files/59082097741.pdf In PDF document text
    • http://lrpharmaceutical.com/upload/files/rigoxutazonug.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/noxejikatozukumejapo.pdfIn PDF document text
    • http://sinosteelcode.com/filespath/files/20210914132409.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613558e67324a---59980092560.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/7709587851.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/t6fkrvdhalv40071o0p5c0p8k6/77308339531.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/kidogurato.pdfIn PDF document text
    • http://tzsunup.com/upload/nawovudato.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/49154870746.pdfIn PDF document text
    • http://soc-in.com/data/media/files/xakopi.pdfIn PDF document text
    • http://maybaobidinhdinh.com/upload/files/xasevisizogidufaw.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-1/20210901161619165597.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/33505066329.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/65404339682.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/66093519188.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/rivasekiridixokaniw.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/pivasaraweduxafojonax.pdfIn PDF document text
    • https://matharu.ae/userfiles/file/ruzorevev.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/dekixisonurovejimul.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/061753492101.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/90127201811.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/mevif.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/zafivumawogefomasorug.pdfIn PDF document text
    • http://cuakeobinhduong.com/upload/files/61649415761.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=windows+10+32+bit+iso+downloadPDF 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_off0000ed46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED46 18160 bytes
SHA-256: 220eee175df2cf1c6979fe1b04ee90c5637c325a9c942de6ec989a2abdbb9e59
font_01_sfnt_off00011c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C28 10692 bytes
SHA-256: 516c3b4f24e1f6ef67209785a6422b65658a2c5a451c8130f860add41e096c44
font_02_sfnt_off000134f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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