Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e7cfc3aea463d8…

MALICIOUS

PDF

103.5 KB Created: 2021-09-06 12:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3fb2ec3e1bff70982dc19faa7703bf6a SHA-1: 4e6e3d29658e1ae2c5f3a6832a4d4b51dd8548a1 SHA-256: 14e7cfc3aea463d83c3747bfe7b14b083eaa334127c831ea49197308fa0acc3d
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised CMS upload storage locations and disposable hosting, suggesting an attempt to distribute malicious content or manipulate search engine results. While no scripts were directly extracted, the presence of numerous external links and the overall heuristic profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/fitiwawiwukedojujuretip.pdf In PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/379csino62ou278rs153svb4no/39661434038.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/lozepag.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/95322656773.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/nonepewovine.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/2f86ccd98d9513fcabfaa5a48d883256/suwoxuruguxalenojefibirud.pdfIn PDF document text
    • http://ecohouse-lab.de/userfiles/file/bitupometajowebolip.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967cd284da2---totamilibafe.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c85f1b6f6ef---wofavisan.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/60693880023.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/jefuxefijusuzomupi.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/65681732313.pdfIn PDF document text
    • http://kleiberit.ru/files/file/11564923029.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/valetezusovavugu.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d4feaa0a2c2---tejil.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/davokijumopibopemuleba.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/viwamigezukeduruweneku.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/derijikiluzufufa.pdfIn PDF document text
    • http://guinyardfamilyreunion.com/clients/62985/File/43690397458.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160edf672bbe05---dikubefod.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16074b0c553338---tepuro.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/dt86j4uj34nqvpqanvfd3sauj7/dobapobarapakavip.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160905351d8a47---70497790993.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/jegukok.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/75299580947.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/51133456851.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=describe+hydrological+cycle+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_off00012a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14258 10952 bytes
SHA-256: 235754c4dd230887d83997c53292e8be1cae0cf1cb601a33f174998363da5c44
font_02_sfnt_off00015b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B72 20156 bytes
SHA-256: a9cc1a5da614be7f44d00932ba713d32d5c6c8e6e12794c1d77536c6fa4596ad

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