Malicious PDF — malware analysis report

Static analysis result for SHA-256 6465136f8c29511d…

MALICIOUS

PDF

107.4 KB Created: 2021-03-27 15:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 19e90491f58a4ca417c6aba7285aec6f SHA-1: a12ce1af2280b1bac8b7fe438b47fae83cac5604 SHA-256: 6465136f8c29511d1a5fd4a1a816a5460072f4563185e865785480fcb93b7ee4
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' and another flagging a 'SE_DOWNLOAD_BUTTON' lure. ClamAV detection and ML classification strongly indicate malicious intent. The embedded URLs suggest a phishing or malware distribution campaign, likely using the document as a lure to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/award?keyword=august+month+current+affairs+in+telugu+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470696/normal_5fe37c25cf57d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401732/normal_6046a28458810.pdfIn PDF document text
    • http://gopagafab.medianewsonline.com/cissp_8_domains_summary.pdfIn PDF document text
    • http://tokesuditetu.getenjoyment.net/fuzzy_c_means_algorithm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454544/normal_602f361610a0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489850/normal_5ff08967689f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486200/normal_600419659e272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420476/normal_604a3a3029175.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412388/normal_603184487295c.pdfIn PDF document text
    • https://dodarumobite.weebly.com/uploads/1/3/1/4/131437296/jojaxekorevu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455902/normal_6008ce1159e1b.pdfIn PDF document text
    • https://bekalerobo.weebly.com/uploads/1/3/5/3/135346313/2397661.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490929/normal_5fcda814cc7df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412767/normal_601bbbd9e7106.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366000/normal_60067328e31e4.pdfIn PDF document text
    • http://vuzuwul.getenjoyment.net/togamegak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417519/normal_5ff7f2687577b.pdfIn PDF document text
    • https://getarejiviwos.weebly.com/uploads/1/3/4/6/134683174/343984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460449/normal_602fe38e60aa7.pdfIn PDF document text
    • https://xomiwisaxi.weebly.com/uploads/1/3/3/9/133999446/7809582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418570/normal_602fa35877983.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://vawinujofupin.myartsonline.com/lupupudijelizusuzib.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/articulo_4_dela_constitucion_mexicana_de_la_salud.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://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_off0000f182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF182 5556 bytes
SHA-256: 5e59b7d5ed34c3032d2f4c0cbd1b3ad62e894ea69816e6a87b3aaebe1d0ed2d2
font_01_sfnt_off00010446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10446 52156 bytes
SHA-256: 659673b37f79bca58e5ea64f80fcc0f7667512559187bb79a2765ade08e8071f
font_02_sfnt_off00016473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16473 11108 bytes
SHA-256: b9f94e9d6326e6f2a2c5fa9222a57d456c54bb062f780216c7d7b12c738446a0
font_03_sfnt_off00018a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A50 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7