Malicious PDF — malware analysis report

Static analysis result for SHA-256 12361c2413058694…

MALICIOUS

PDF

71.7 KB Created: 2020-12-16 14:28:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e2d2e3e8ca963863db0e74e143fc11d2 SHA-1: 9a5ee976fe8a709c4073251295234f69122e2e60 SHA-256: 12361c2413058694dc8f0d15acf7e4d0a2cc71f37d3bf15250e3d335b6656d32
214 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a high likelihood of this document being used to drive traffic to malicious sites. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://traffine.ru/123?utm_term=mens+military+jacket+pattern In PDF document text
    • https://gobujapupi.weebly.com/uploads/1/3/4/7/134725152/punik_gijafabedek_gilaj.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/kuwekewugi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d436be-9584-42c9-b59a-57346b932d13/triangle_sum_theorem_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50b2968612547ed78a8d7/t/5fd64673ab777271768b011e/1607878259974/1755869008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37bc8bec-05b3-4318-8ab9-feb66930a925/womens_ministry_description.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/897d656d-3e44-4b79-a5b8-13ba5d490789/voyager_middle_school_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d57175-8415-4ab0-82a1-0c243eecdb73/creative_n10225_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/615ecb21-47c4-4884-a8d8-94a368c0d0e5/standard_enthalpy_of_formation_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad724fb-1c43-4dee-9295-ed36417be849/fallout_5_nexus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22c9c0f-584e-4b8e-a534-b92fad27297c/sarakonaxoduduf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e28509-99da-406c-84a3-2ed05d64bebe/69345574809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93831f52-e7a4-47c8-a377-bab8c7d0fefa/97547467183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9fd2809-a08e-49f4-8b3e-834d22dd4a9a/nagerisu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf60981972c46e3c9671e1/1606377628812/garlond_steel_ffxiv.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8B 3400 bytes
SHA-256: 4ad37edf3f1c00ef8c6df1211629adeacec978db08cf2f9dafa3a9ae3e50da8a
font_01_sfnt_off0000dbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCA 5328 bytes
SHA-256: acec68acd0b85582e1c411dbef0986df3ccc94a7e96a65d51147637fb1ec6f9d
font_02_sfnt_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 10536 bytes
SHA-256: 0257f6bfaa3ccd6f2e0875f895fe1d513481f2a3d0c33b41450a020ba94e53cd

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