Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c87a05e1f48f1e…

MALICIOUS

PDF

77.8 KB Created: 2020-11-25 20:26:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cdc96c3679e37bba58bbc4b9fb8e51a SHA-1: 08043c85f5960d9784af2d292f1a7fff1aff9686 SHA-256: 64c87a05e1f48f1ec0a4f732fa2219cd1750efb617a1fee4c52bc525861f483c
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs suggest an attempt to direct users to potentially harmful external sites, possibly for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to manipulate user navigation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=numbers+in+binary+chart
    • https://cdn-cms.f-static.net/uploads/4499999/normal_5fbc83bbb28fe.pdf
    • https://cdn-cms.f-static.net/uploads/4446931/normal_5fb6b6dae3827.pdf
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f921101f04ff.pdf
    • https://lerinajivawexof.weebly.com/uploads/1/3/4/3/134327174/b9ae3d8d17.pdf
    • https://cdn-cms.f-static.net/uploads/4485445/normal_5fab890d4ccc5.pdf
    • https://cdn-cms.f-static.net/uploads/4460708/normal_5fb788a8226ad.pdf
    • https://cdn-cms.f-static.net/uploads/4390056/normal_5f94143d3b1a1.pdf
    • https://cdn-cms.f-static.net/uploads/4374532/normal_5fba4f84d1d18.pdf
    • https://pemopexo.weebly.com/uploads/1/3/4/3/134305592/2d13b6a8566d249.pdf
    • https://ritibamubube.weebly.com/uploads/1/3/1/4/131437410/kesafixapepu_pavuxo_radebevomawa.pdf
    • https://cdn-cms.f-static.net/uploads/4471719/normal_5faf3e37b0208.pdf
    • https://cdn-cms.f-static.net/uploads/4448720/normal_5fbdcbacee9ac.pdf
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5fbbfbd5a7a90.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/e2059672-9db2-43dc-8613-f254fee2b6f6/kia_spectra_repair_manual.pdf
    • https://uploads.strikinglycdn.com/files/4e747304-628e-4233-931e-854061d77b09/esquema_de_un_ensayo_reflexivo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c779.bin
45b413d0a39a73e74c41243ff18d4ef2c1ac145a616171726290eb5b056c6df0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC779 4992 bytes
font_01_sfnt_off0000d83b.bin
003bd956fe8d31fdd2d2c1322ffec7f549d954b3b9a3f05709a31b1363846740		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD83B 2196 bytes
font_02_sfnt_off0000e279.bin
ce24f071049ba9e9bd90561d767948e1fb3f87f47c29877e549657f30e3fbeff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE279 10256 bytes
font_03_sfnt_off000105a5.bin
78493034c033d0861782d53997b784eeb14f7cecaab48b0f43681cd7da4d5e88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105A5 16328 bytes
font_04_sfnt_off00011b5f.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5F 4324 bytes

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