Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bb0fb8c446ded2…

MALICIOUS

PDF

86.2 KB Created: 2021-07-30 13:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 63263bb48b852630931ae5648c36c436 SHA-1: 969699e342a5f3c8adc9509f5d38119ac614810e SHA-256: 46bb0fb8c446ded2fc82f460cce252f2f4850d10b9db93dad3c720d9685fc6f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate this file is likely part of a phishing or malware distribution campaign.

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 https://oniceh.ru/uplcv?utm_term=10+reglas+y+normas+de+la+vida+cotidiana+diferencias PDF link annotation
    • http://fandimnarodaku.cz/upload/file/97946910023.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100e0e116c86---wowexinajukelaxoxedajowuz.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096abc629c11---18377101659.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/zukuvirik.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/8424165932.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae8f230743---73176574878.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/3133f03902bfc2d1c09ec1d3fa093951/nubopufosula.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/6d74f53264f27a965d0223b437f8b189/84200846858.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/dugukesovu.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb983fa14c8---kabilemido.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/1856158396.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/13968952888.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/17580094029.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/ziweliwekemifu.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/40292944276.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/a47e263d80c42ebfe9737aa18714e4c8/9354600478.pdfIn PDF document text
    • http://aplus.to/userfiles/file/fobetowizokeser.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/27905839103.pdfIn PDF document text
    • http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/junaguvixogebodefi.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/2ef65ccec5cebac444415f05f19379d3/93141551401.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/zovolesigixalesatitegi.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/xexalifimapu.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cc26fd4f44f---letiwelivezisomodujofo.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942fc981caa---17746335749.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_off0000ea7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7A 11076 bytes
SHA-256: a9d992749480a225e2913a859355d7a7cb003c50d7c3884b64b539b551782714
font_01_sfnt_off00010425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10425 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C37 17708 bytes
SHA-256: 1dca67c980fd8be36b0e00e9eaaf4a08ee5152082df821bb5d6320c9b4c22e6c

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