Malicious PDF — malware analysis report

Static analysis result for SHA-256 d459ac53c9e127b2…

MALICIOUS

PDF

80.8 KB Created: 2021-05-07 00:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7c9f5a3b4d57924cd8b40d519a9db0ae SHA-1: d483b0910aa42464ed220d9a9d7ce0a70ea75657 SHA-256: d459ac53c9e127b20ef65306bf12207524b51da88e77671f84c6bc53e0a03f86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple websites, many of which are hosted on compromised WordPress installations. The document's content, though obfuscated, suggests a lure related to 'kpi dashboard template', likely a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/ecc4cb75201e26ee1f9b4dbda2c2d6bc/13677930252.pdf In PDF document text
    • http://dok-vo.ru/userfiles/file/82340579242.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/fivikepitukili.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/4a82b7b18e1f5f768566628390645e80/63667768775.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079dfa7f122a---66075418692.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc60811cad---dolofufenasagipux.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d7fe6dd4d---tuxobavesad.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/7648582427.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/tiluli.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/8bf70e7c9f98e66a660de3eaac63b3fc/27617205392.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/na3gavteti1n7efbfn93peck35/16027115128.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945997d02c2---puninugufibamizufafe.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4f1f28690---subogisulaviwinixopadem.pdfIn PDF document text
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/d612830cb6f63ef8d7493ef408ea105c/21797163356.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/5oh63q1t3mmu0ktkv15ob9t4t7/tinimefi.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/96accc7d20e95ff6aa63e88abeab47a8/ranena.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1e0583513---pawifek.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
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=kpi+dashboard+templatePDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF222 4992 bytes
SHA-256: 29fbd4679faddcd80ac14d1488c64757893ec31b42dd65cc90a94506d0e0e4c1
font_01_sfnt_off00010314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10314 10480 bytes
SHA-256: 9dacdf71ca69e250f5db81ff79011cd778bcd90192dab94e184f4996d6612ea7
font_02_sfnt_off000126ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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