Malicious PDF — malware analysis report

Static analysis result for SHA-256 302ed52d17d7a33f…

MALICIOUS

PDF

80.6 KB Created: 2021-09-12 19:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b5ae94ac92f508732d5778b5ed35de5b SHA-1: 113a9829a2632c8fc6663554e015c38dbcd787b6 SHA-256: 302ed52d17d7a33f8237a3f2352f36da617028ff783669c47c98f07988875f88
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains embedded JavaScript and multiple URLs, some pointing to compromised CMS upload directories, suggesting it's designed to exploit vulnerabilities or trick users. Heuristics indicate social engineering lures, specifically instructing users to copy/paste commands into shells or install remote support tools, aligning with ClickFix and remote support scams. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 10

  • 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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • 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.
  • 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 http://mcutech.net/files/79064616375.pdf In PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/17024794051.pdfIn PDF document text
    • https://urbanshapes.in/userfiles/file/8771458355.pdfIn PDF document text
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/nojijigaz.pdfIn PDF document text
    • https://felicityokolo.com/file/44269511044.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/08/66441373496.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/nokaruruvukexed.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210912031018_1911252506.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd1648bc2d---79818466323.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16135f3d607f97---35660767956.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a16241eb52---99244670238.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/14468220965.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/228926c480b5e5a958f7490ea2245b4b/67421428625.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/badelabezawinokodumugaxo.pdfIn PDF document text
    • https://berbagiangka.com/contents/files/20961850870.pdfIn PDF document text
    • http://idroter.org/userfiles/files/25616037286.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/zaxobabigevulagini.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af662c0eb7---74097193075.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/57277292428.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/zutobulawovogopigus.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9fcb1b6f9---pelavodoxipi.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/39132062167.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210908235155.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/miruxelenovumonapuvovoz.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/66406767516.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+enable+usb+debugging+on+android+with+black+screenPDF 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_off0000d512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD512 11060 bytes
SHA-256: 120a32d1289ea7d01db0f45a730049c0d43b206faf716ed854319ba58b80ca20
font_01_sfnt_off0000ee91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE91 17824 bytes
SHA-256: beefd1d275643710a91d2852f7fd27d7a5182cfb0c09cf8d00ca8491ffc84224
font_02_sfnt_off00011c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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