Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d7a5a6a0bc2477…

MALICIOUS

PDF

82.1 KB Created: 2021-09-10 06:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 39185b1dcab3b64aeb12323ccf6315d8 SHA-1: d2aad25cf30ce6e2cc1939ba574dfcd7ba1e04ff SHA-256: 54d7a5a6a0bc24770e5bb95aaf53c21b0499651524e34c793015f799232f65fe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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 https://noble-program.site/js/ckfinder/userfiles/files/nawazuwivibutuxiwu.pdf In PDF document text
    • http://thueotodn.com/uploads/image/files/mopodotivik.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/53961051645.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/fibufanumakojupejeje.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/87743156746.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613036cde659e---lufuge.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/50032871563.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/kanusadawitibiboxamodofub.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/5518461868.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-4/20210904040257832375.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/2c0a16953cd00a90a947e82f279ed0f4/pavex.pdfIn PDF document text
    • http://agro-partner.com/Image/files/geburosotizof.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/85378294193.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/86933608553.pdfIn PDF document text
    • http://artattack-concerts.de/files/file/mawajufawexasaxale.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/92828212189.pdfIn PDF document text
    • http://hbisan.com/userfiles/file/37225230439.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/63420322510.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/89985339851.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/e9833edc18dd012d09abc62a3eb77f98/90424760672.pdfIn PDF document text
    • https://twinscooking.nl/twins/userfiles/file/93490926936.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/bitotikusomelitanotegerag.pdfIn PDF document text
    • https://viceda.com/userfiles/file/kuzasikugubatasenaxur.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/kikuvebutukagorabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=como+ver+videos+formato+avi+en+androidPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD818 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02A 20672 bytes
SHA-256: 24b91905642e73f5227809f7302328acb915c40022795f20a7c4fa632e03aaad
font_02_sfnt_off0001239c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239C 10564 bytes
SHA-256: 09d50063b2675ff0db34374bc6b459413cb4915cbb3b471e2797dc31585cc9f1

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