Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e5ad894d647611…

MALICIOUS

PDF

94.8 KB Created: 2021-07-14 00:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 87da5cd81fddc95fa894a5506306aa21 SHA-1: 3d34ba8d910cf1579bc8bfad2ff348814a94e727 SHA-256: 47e5ad894d647611920c68cd529d73adf5a88ffdbddbe692910285b6be918302
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of multiple external URIs and the 'link farm' heuristic strongly suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://ketchas.ru/uplcv?utm_term=titration+examples+with+answers PDF link annotation
    • https://lionkingbali.com/uploads/file/54279916253.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/f4175055064f0ca4ad3e62cf6b286ef8/48545820038.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/26970972709.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/verapofalegagoro.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/6b9253598f83814b8ce93abb0f98313b/47579996055.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e13ad4f2a---98038705468.pdfIn PDF document text
    • http://nhhs78.org/clients/63854/File/nikapo.pdfIn PDF document text
    • https://lesura.net/userfiles/file/42789801568.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/24863721059.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d78b47561f---palekolojokapupozivoxoga.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/nugowirazaduk.pdfIn PDF document text
    • http://daglichtfilters.nl/ckfinder/userfiles/files/jurulef.pdfIn PDF document text
    • http://wych123.com/upload/files/xasefiloripolovalivotozuz.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4289447c55---90382971449.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05ac9d087d---66736895444.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/e2c16f935bb7fe2343d96924c6a59eea/ladaku.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/42414856392.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/tm61bvldqa6o787jacnq2th8hc/75951642771.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/dexuk.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/p8qhqci2hna95l8k4ud0ussuo7/duwubajamod.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/ad70c872f0dc1701c877ff654d7b4de7/zofuwinaluju.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_off000110b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B9 17076 bytes
SHA-256: 4492370069fff9e650c123eafbb7d371d0521c1f9da62509a250b415b0d84b2a
font_01_sfnt_off00013d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D95 10668 bytes
SHA-256: 016073ab85bf0c7c84ea2bb38151eb00c3040cbfb1e906c65a199d534838f371
font_02_sfnt_off000155e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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