Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddfc26a46d79c3e…

MALICIOUS

PDF

221.3 KB Created: 2021-06-14 14:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 416a97c57e9dd9300dcafca4c7d9cff9 SHA-1: b50c4bace0bf224784fc991099f847df22504f14 SHA-256: 3ddfc26a46d79c3eb4bfb278e9b3165f8671e096c09fb8d85658b24226750048
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The document body, though heavily obfuscated, appears to be a lure related to song lyrics, likely intended to trick users into visiting these malicious sites. ClamAV and ML classifiers strongly indicate malicious intent, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://medvor.ru/uplcv?utm_term=a+million+dreams+lyrics+by+pink PDF link annotation
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/25b4ee919352216b8ef86b6136c96e88/76268142686.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075658e45058---xotijasixilereka.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/wabekekolifamuwelizoreso.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/8d5042b2cf81ca06699376330831eb5f/57627348963.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/daxeluniruxel.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa541044f8---jusorudovufixewirajuw.pdfIn PDF document text
    • http://www.bash.cl/media/file/vimatevaviwoxixegisaw.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/feecdbf0babb1ef510a9fa2479a7e329/sevomuragobawefuzinojixav.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa2be5db6---76268583047.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/8ab5741153bc8edaed061823e9ab318e/roropuvuniteraf.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609625fc38cd4---xunotagobuk.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/luwetegelax.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b80b1193---jeletosisoxe.pdfIn PDF document text
    • https://arerp.kr/data/file/%5C/kaxoputiw.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/xatuvesagumo.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210526205656.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000304ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304EE 5224 bytes
SHA-256: 8f8074608cf2cb788bb9b2e90fa63bc1b729309879aaa54fdf9759dd7f59d0ee
font_01_sfnt_off00031687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31687 14472 bytes
SHA-256: 7ffad6b05025bbccb1f7fbfa95cfad3cbbdca2f9ec8c7e913442afe67cf511a0
font_02_sfnt_off00034403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34403 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d
font_03_sfnt_off0003589b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3589B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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