Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25061bfc095c8ca…

MALICIOUS

PDF

35.9 KB Created: 2020-10-04 11:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3cd75f7443e25aca8d08a916bf43c958 SHA-1: 917b6d3102129043317db77d99cc118605f710bb SHA-256: d25061bfc095c8cada990687646350b5fb6077261586c4c7067c7f1ac601b83b
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure. The ML classifier also flagged this PDF as malicious with high confidence.

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://ggtraff.ru/strik?keyword=letter+d+worksheets+kidzone In PDF document text
    • http://files.mccown4science.com/uploads/1/3/1/4/131406537/kamezabogajunefojo.pdfIn PDF document text
    • http://files.davidvitt.com/uploads/1/3/1/4/131412181/3511243.pdfIn PDF document text
    • http://lalipajar.aroosterstale.com/uploads/1/3/1/8/131856917/f25467d8.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/05f7f82b-bc94-4b77-87ff-9709eed452d1/daxajot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42bd0f78-628c-4542-ac40-c00dc79731a9/wabukegagalozunofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f86574e-b004-4e5f-97ed-c3bb96d8c5f8/43645626698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be5edb32-6177-4fd6-9fe6-e9b4c0f5c751/wiwamefizagapijug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee78bb13-769b-491b-85e0-9f37914cb8a5/fegukenebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/817c5677-0253-429a-aac5-7fef3831a137/zedikizubejuruzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/93852018273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/7883308286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/6316/1244/files/tedodipowalujafu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000515d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x515D 4816 bytes
SHA-256: df76a2554e9500fdb4b16a56394fb0a216059b16d0a71bc118637e2d1b847298
font_01_sfnt_off000061d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D9 9736 bytes
SHA-256: 00cedd0e6cf5b451f1b694bf6429897591b10dce5f4ec22315b0a7d79f73b07a