Malicious PDF — malware analysis report

Static analysis result for SHA-256 211ecaae27957826…

MALICIOUS

PDF

60.8 KB Created: 2020-12-15 22:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2d38afc2fe250636f5edde0266763552 SHA-1: b5aad9d2653954fb14b3821e6dba03729236c03b SHA-256: 211ecaae27957826a86991b12cc12929d74f1a6ed5d42dc6da158ef11b7e28a8
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of a malicious URL is a high-priority indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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.
  • 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://cctraff.ru/123?utm_term=types+of+maps+worksheets+3rd+grade In 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://uploads.strikinglycdn.com/files/1ccdf567-4952-45c5-80ff-d4f64062d06f/ruzuzevon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/064138de-c142-47b3-bd07-da9cbac01d1d/black_capped_chickadee_birdhouse_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/36765812265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fe1a6ee-1be4-4d79-bebe-efad4b3e9216/guilford_county_register_of_deeds_marriage_license.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67786c62-c7a0-41bd-97d7-40c7d8f610c7/17590963374.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/17922257029.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf3f73ca23154c95a92f8/1606218743822/zuren.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/35965768636.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/bavuxesubalaxufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e25508d2-57a3-46d0-a87b-147d73c389ed/refodaxim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a094f6a0-0ae6-4f68-a4b4-2151fc59dc3d/western_arkansas_counseling_guidance_center.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/36773338956.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_off0000a6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A1 5428 bytes
SHA-256: 41687768729ae6a61ee638721d957bbbc2d2bf4b7842447e35cd2f4b2ccc6213
font_01_sfnt_off0000b932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB932 9144 bytes
SHA-256: e2b62a3f86251681628b2e394ede04ac2e8a5aacb7b53bb913640e3601dd01ca
font_02_sfnt_off0000d869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD869 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f