Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66f16402d9bf249…

MALICIOUS

PDF

43.6 KB Created: 2020-10-07 06:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 943d128c5cfa25a0fff0e9cb2cd6c56d SHA-1: ac39632465b02a176f38842291dcd571e6c9fa47 SHA-256: c66f16402d9bf249be7289f902aced950856fc7b8f22a19c4ed50bf51239c544
94 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to a known malicious redirector. The document body, though partially obfuscated, includes the malicious URL and other suspicious URLs, suggesting an attempt to trick the user into visiting a malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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/strik?keyword=manual+handling+procedures+warehouse In PDF document text
    • http://files.happyvalleyartsacademy.com/uploads/1/3/0/7/130739227/4844434.pdfIn PDF document text
    • http://files.sleophotonics.com/uploads/1/3/1/3/131381681/2966849.pdfIn PDF document text
    • http://rorupol.thecatsmeowtarotandtalismans.com/uploads/1/3/1/0/131070027/9267947.pdfIn PDF document text
    • http://files.magrudermurrayart.com/uploads/1/3/2/6/132680896/4241340.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://uploads.strikinglycdn.com/files/2ca656bc-0c22-4009-a24f-7c7cdbb2fa5e/62732543296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22e3b85-c6c2-4b3d-9910-47fa62835d4f/84981623478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/aroostook_deeds_south.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3379/1144/files/97094015938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2932/7783/files/nook_10.1_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5732/2903/files/aptos_middle_school_bullying.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8348c0ed-7d27-4c68-93f0-e7c8201fa22b/ganin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7353321-bd42-47af-ad0d-769cd754f6b3/71568565563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce7fbf52-989f-4ebb-9d5c-844eff5722da/88517690324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d907a524-3f8d-4e29-bd69-206e802d5147/nedigu.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_off00006071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6071 5236 bytes
SHA-256: e16625056affb9b36dd35671d79726e1f93ca5f2e4c6b52cb87eaba4977c7dde
font_01_sfnt_off0000722f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x722F 9688 bytes
SHA-256: d5ea42c9d273b9d936fccb24433647809eab08850e9da39e9ae533da4f636803
font_02_sfnt_off0000934f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x934F 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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