Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c656224d22b812…

MALICIOUS

PDF

87.4 KB Created: 2021-09-16 18:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 7927327d562ae0137a590e3e9a2d421e SHA-1: 5a1c01934c1372b88f4e9d813ec5e53848135e6c SHA-256: 01c656224d22b812e3fe1b15d238ce593c930255d622db4f493963ddd5684d04
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with many embedded URLs pointing to potentially compromised websites or disposable hosting. The document's structure and the presence of numerous external links suggest an attempt to lure users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://automatisme-portail-bordazzi.fr/userfiles/fichiers/65101981668.pdf In PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313383e5d7d---84217418282.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/tivotolez.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/95345046646.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/nutuxatedoworud.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/a84f47e13d6c092aaa64adf3e22e66c2/31967638826.pdfIn PDF document text
    • http://htygroup.com/upload/files/numogisir.pdfIn PDF document text
    • http://ilsungwarehouse.com/userData/ebizro_board/file/82664018499.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/xodafajoxa.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/selazizugijasaroj.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/88718725608.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613569f921265---jadil.pdfIn PDF document text
    • https://aromamarketing.md/img/files/42390476806.pdfIn PDF document text
    • http://tongrentangthai.com/UserFiles/file/19417580141.pdfIn PDF document text
    • http://fanghsin.com/uploads/files/202109010821154668.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161364e9cbd9e1---42796612962.pdfIn PDF document text
    • https://sibiucuratenie.ro/fckeditor/userfiles/file/81121499352.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/rozobokolugedipav.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/7117270466.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/30272557186.pdfIn PDF document text
    • https://hsse.hssanesteban.cl/files/voviput.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/75962276959.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/34130576803.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/41176391769.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=john+wick+3+movie+tamil+dubbed+downloadPDF 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_off0000ed85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED85 18708 bytes
SHA-256: 30cd68780729b3cc7143689cb827e55db0ec734baf30ec0d5a0a8ad9e1689085
font_01_sfnt_off00011dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13614 11016 bytes
SHA-256: 99f4fce134bf0161b31c67507caf7c17846812f2a77811f0439486280ae48142