Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ffbe3d73e5c9a52…

MALICIOUS

PDF

82.3 KB Created: 2021-09-14 23:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c84a94e91d7d88263cf4f995deee0c14 SHA-1: 369eaae491446390ef48c32937de92c125cffc04 SHA-256: 5ffbe3d73e5c9a52525aa87ce10ea5ba2e011788bedefccb17e0920792116c9b
204 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to potentially compromised websites and a 'link farm' structure, suggesting it's designed to redirect users to malicious content. Crucially, it includes a 'Clipboard command execution lure', instructing users to copy and paste commands into a shell, which is a common technique for downloading and executing further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://philabc.ru/uplcv?utm_term=developer+option+in+redmi+note+9 PDF link annotation
    • http://0vote.com/ckfinder/files/22906268153.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/82293481544.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613e75d1816b6---buwiba.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/bimamumede.pdfIn PDF document text
    • http://oecschool.com/userfiles/file/33948069016.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/ridobuzizaxog.pdfIn PDF document text
    • http://mikailang.com/userfiles/file/20210910114719_493037156.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a14018f2b1---wasovitak.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/35285732164.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/77558289580.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/biwof.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/ab66e4f63d5ed89c4ae77976526a1223/kujimuwada.pdfIn PDF document text
    • http://kuryakyn.ru/userfiles/file/konoda.pdfIn PDF document text
    • http://genarchi.com/data/temp/file/vabijibegejadu.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/aa4cb43057921609079627ec46154477/90995395946.pdfIn PDF document text
    • https://curvy.tw/upload/files/24557141766.pdfIn PDF document text
    • https://redengewinnt.com/userfiles/file/gekenujodabowajulapuz.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/zowuripatapikit.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/werajunavisativodujipilub.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/fusolasajaviwuxofuz.pdfIn PDF document text
    • http://air-ned.com/uploads/files/zesofotexuvuxajog.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/6923751a53b2be2cdd3824a32a69c47a/83335829602.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/54139253363.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_off0000dbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDD 10456 bytes
SHA-256: 14da09687845b3093cff58ef7ea4c2c9e3f62a4bb92d108b05611252aecea418
font_01_sfnt_off0000f387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B99 18464 bytes
SHA-256: 31819827bb2d34796c035b88b41116b57d1ee23b88ccf8518d9d39188c8f18ea

Open this report in the interactive analyzer, or submit your own file for analysis.