Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ce4e9550e56cee…

MALICIOUS

PDF

78.2 KB Created: 2021-09-05 20:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e7a5fea38a00ede56262ef8fa04b7a29 SHA-1: fff714236fc02414eef0f2da188cc771b68b983d SHA-256: 14ce4e9550e56cee3a9afc1d6026a08f9eb364dbdf1d7f79dcca94067908c151
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or use disposable hosting, indicating a link farm designed to lure users to potentially malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://benrassam.com/uploads/files/63090492338.pdf In PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/jilaberuwiveliwifaraku.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/tjnafblalbi57gvpr816o3r4en/51677442499.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bd970de53---41036691723.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd5de256b1---75896702861.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c495348e018---wukosejevokakotelelux.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7a0909aba---15484994458.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/11936018024.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/46870540175.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3a92cc9da---kebunavifaruraf.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/80469261021.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/kuliwamavidaxom.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/59031580150.pdfIn PDF document text
    • http://kalikraft.com/images/file/wanumozari.pdfIn PDF document text
    • http://armanetti.com/images/xezivudavisozinazeju.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/78738011995.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/gifurinovepenilekijijox.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/eef8bce0c59c90f763f8f2576c31b8c5/xikowejosebewes.pdfIn PDF document text
    • http://ingore.cn/upload/files/41921606061.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/86dd2f6341550f49a7b16487e45c8fef/89892901207.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/246c702bb84549c8166d750a9195ca74/vowewoke.pdfIn PDF document text
    • https://afayl.com/userfiles/file/48330499152.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=quimica+inorganica+y+organica+pdfPDF 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_off0000c9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AE 19244 bytes
SHA-256: 33552cfcefc24667515ff72c01e6f167b05c636b21eed003e97ad47bead39c49
font_01_sfnt_off0000faed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11304 10792 bytes
SHA-256: 3f55a7d3d9b3b0da949d1c2497d0e31bd412448c0782d808ffc3339ad8d3d57c

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