Malicious PDF — malware analysis report

Static analysis result for SHA-256 961c142860077a38…

MALICIOUS

PDF

67.1 KB Created: 2020-12-19 15:54:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 70d1c61745141ae5d2624917a63457f3 SHA-1: 549f608cc22e730d0cfb973e94e1c9ea1f2ff426 SHA-256: 961c142860077a38c0026e00f67dbe8ac84599138afc9a278abcc5c8060f7bb0
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/aws?utm_term=free+online+blackjack+games+no++multiplayer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445106/normal_5fd2c0b2dd5c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379489/normal_5fb90c57c99b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_5f9bc52d8b116.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xixonu/maxudukezavaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2161aa36-7f2f-4ba2-ba69-00f170b1b27a/13900991155.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/dontbebroke_member_log_in.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28fecc30a162e0c5d0be7/t/5fcbf5bb3ff1011540dabd05/1607202235965/video_game_music_ringtones_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e066de7-6220-4fae-a316-33111d1055d3/wifewuxetolos.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/dajirojube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f82cae-a2ff-424f-8b0b-6cac3eadc74b/latulomexo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d8dd27a199023aceb4ee/t/5fcb3ec021c0486e9191a3f5/1607155401185/baixar_bloxx_craft_girl.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_off0000ca8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8E 5592 bytes
SHA-256: 52b7c0860b0cbfa207b815c5cab2711cd3edd22b8faa4bba4ff395fff1f2e1b0
font_01_sfnt_off0000dd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD90 9996 bytes
SHA-256: 6dbae64740714eecd092a36d8b754df07a80bb853f462a1dfd26b526b0ddfc91