Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce150df6f4c56e8a…

MALICIOUS

PDF

82.0 KB Created: 2021-09-18 23:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ecf715367575cb33e6c2f7478fbaff29 SHA-1: 2cb63e43a02c56220066bb7b3d84d7a0404a9974 SHA-256: ce150df6f4c56e8a43959186fc12aade5a4f69f62d388d5cebf7fd6ef25bb205
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating the document is designed to funnel users to potentially harmful content. No scripts were extracted, but the overall structure points to a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://drafthe.ru/uplcv?utm_term=ps+touch+latest+version+download PDF link annotation
    • http://abwmechanicsville.com/uploads/files/88050968386.pdfIn PDF document text
    • http://sooclose.eu/upload/File/76885285067.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/xoledakuxumobojiwu.pdfIn PDF document text
    • https://artistaone.co/userfiles/files/31491761280.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/8hesug1jn9fe1k48au70bd5s3f/79262172449.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/pinugojogagopowudaxutekok.pdfIn PDF document text
    • https://festacontinua.it/public/file/wigefekuba.pdfIn PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/33166777148.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a9ccdf0ff---31508859175.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/deserutobixis.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/gakebowowononuzenuluwa.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/sopesasujepi.pdfIn PDF document text
    • https://wroclaw-effatha.pl/grafiki/file/83433268015.pdfIn PDF document text
    • http://xaydunghoangthanh.com/img_duhoc/files/tezikirula.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/32478422174.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210919021802.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/49895578117.pdfIn PDF document text
    • http://022-web.cn/uploadfile/file/20210914191358847.pdfIn PDF document text
    • http://montesantangelo.it/files/files/62832985636.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/18428397317.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/54256509317.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/jajizela.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/54403943355.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/7b069089cf474e33455f6ca4072a1e3b/9750192955.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_off0000d9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A0 18484 bytes
SHA-256: 085acfeb127db125e8cfbc675d39957289fc7bede81502b4d3f8b56eff244554
font_01_sfnt_off0001094b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094B 10720 bytes
SHA-256: 7cf26528ade61f21276a1103a4dead3e0b733471b6eb8336afc29a4bef8ed6b4
font_02_sfnt_off000121f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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