Malicious PDF — malware analysis report

Static analysis result for SHA-256 24d03482af2afe8a…

MALICIOUS

PDF

87.8 KB Created: 2021-06-30 23:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bd4ff4290f13fe84a26f0b0d842a7a61 SHA-1: d1b21fa51a0c21b5f8f7f37b805d234126f0e1d6 SHA-256: 24d03482af2afe8ab5478f808b3afc02c2d765dd39ed34d0e815763f0e9f68d6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely serve as a distribution point for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc220d80606---ranatilexu.pdf In PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d02a286874---ragunipebagopunikeni.pdfIn PDF document text
    • https://mides.vn/images/ckeditor/files/nivujapusokurewu.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/dozixu.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/3978786732.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607b91d6401bd---mewuwox.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///86367836123.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a97f682425---domedivimozijovum.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/73202984702.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/91683503953.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb850ae19f---kadenafoxovuvowaga.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/bemufev.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a51a4d004a2---zuwefigokum.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084de02e98e2---86742986872.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160808f28f10a2---87841183611.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/26idev8tibri6vs4t5d624gfk3/sepuleposunetabe.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/1c1bf5sg8rgo1ujtjnsl5gqc52/kulaxunanolagedu.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942b5d2f74a---koboleban.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/19797478256.pdfIn PDF document text
    • http://446888.top/userfiles/file/66135642385.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a11a234dba2---14163924929.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792b2386ed1---bejef.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/rapotisewazofukopix.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad408b9496b---50338336685.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=dispersion+devices+spectrophotometerPDF 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_off0000f5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCF 16920 bytes
SHA-256: 9ab4fb97146b5d0e0a6a1dd84456afa04ea1912eaf8a27e40a2c974248432a49
font_02_sfnt_off000139fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139FC 10640 bytes
SHA-256: a444c5fbadf06e6b5b4fd90f2f2eae0b7a2269e1c2190decb72d609ebf642dc9

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