Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e0cff135640884…

MALICIOUS

PDF

88.5 KB Created: 2021-09-13 06:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 937c4a4d798c806dee0131cd930dded4 SHA-1: d3e0e842788c6dd85b9b5de6b65fe916ca9abf32 SHA-256: 09e0cff1356408843e176be60f54d4e4066fa7b82c8201649789a198c2778a29
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to potentially compromised websites and disposable hosting, suggesting it is part of a phishing or malware distribution campaign. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste commands into a shell, a common technique to bypass initial security checks and execute further malicious code.

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 http://twozonechickenlasvegas.com/uploads/files/64370768517.pdf In PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/96964109002.pdfIn PDF document text
    • http://allasclub.com/campannas/file/ruvefuxaleru.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/56747445770.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/8064282997.pdfIn PDF document text
    • http://tottazo.com/userfiles/file/39371833591.pdfIn PDF document text
    • http://playoz.com/ckfinder/userfiles/files/98060571767.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/32789205637.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/xuweperoje.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/gatuvekejuvugi.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161305157ab11e---82532499953.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/831368f7ab8ed92e81ac3f12dba0e4c4/vonifirepelev.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/namikadonaja.pdfIn PDF document text
    • http://glassick.com/userfiles/file/25386956927.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/83955795731.pdfIn PDF document text
    • http://bociany.sk/media/file/kurax.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/36861734081.pdfIn PDF document text
    • http://linker-apps.com/files/6960445920.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/62130841669.pdfIn PDF document text
    • http://nemochem.cn/upload/files/saterezatatotojugonuzufor.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/72494108590.pdfIn PDF document text
    • http://szjg.hu/images/file/61921468862.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffcaba2a8d---70770700739.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/27126048697.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/5777868050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+install+an+apk+file+in+laptopPDF 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_off0000f277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF277 19276 bytes
SHA-256: b71bc6349659b9f3a13d1d9d8d89a325b09419574a6426774cf8cfd008a3baee
font_01_sfnt_off00012456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12456 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6D 10420 bytes
SHA-256: bc31b2273a6c533f6b092849d58c2bc501a2ac944cee355810f6c8e559c22980

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