Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0386982344a07bf…

MALICIOUS

PDF

91.2 KB Created: 2021-09-07 05:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2ea5b650c655efb3a97f22e67ff20349 SHA-1: 68954697477cf0896a535325d7d46456f5acd107 SHA-256: e0386982344a07bf52f4d57eed0e95145a689841772ba067f5ca9366921d6e04
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, characteristic of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded URLs suggest it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://dukeofmarshall.com/ckfinder/userfiles/files/53959951040.pdf In PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608097f40078d---44248634111.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/fezopexesunetadoxurarog.pdfIn PDF document text
    • http://szigmetal.hu/editor_up/pifirazi.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/gelokopomekuludegefobelu.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/a94f4ac2703dd77eb1c573914a471acf/gaterekikegumebivinenalum.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083970e324f4---29776821038.pdfIn PDF document text
    • http://cloverdiamond.com/file/jetinuso.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/ruzinifekijabum.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/3c0301d46ead7458d0ed512ff2905ed7/veziganodefu.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/52400322741.pdfIn PDF document text
    • http://foodchemsino.com/d/files/25830162801.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/23280428308.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/d99233d2ae15d9b4b3bea1ad2a82f48c/penovijoxemegex.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6e6097ecbf---84882446764.pdfIn PDF document text
    • http://amdind.com/userfiles/file/kifojarovoxobuzedikatij.pdfIn PDF document text
    • http://aimic.com/userfiles/file/xajoxorub.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/0c1a4ac54c803d790a57d61f80299c6a/10782715868.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/momonidiboputemobijum.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/3f96d30a19a6a5c11c1cadb6d4500c42/12603461381.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0c5785080---34201476935.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/46949649321.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=small+estate+affidavit+form+california+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_off0000feb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000116cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CB 18084 bytes
SHA-256: 4d0bedfd766711d179eb22e007f3f295c30b2767efa5207976cdbdb95c57d81d
font_02_sfnt_off00014571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14571 10924 bytes
SHA-256: 305cce9b60c2c4039f3ee0bf14100969354bf63d1fff0334091cc401519b9bcd

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