Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccaf898a0a99b62e…

MALICIOUS

PDF

76.4 KB Created: 2021-02-27 21:56:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a05142be3a8f6c1439376e04d3b17d2a SHA-1: 86c1f67cc8d42d5a6824bc66c7abc24ea74cf5af SHA-256: ccaf898a0a99b62edb825f163e93897942d08cccfaaf0f001c7ab7404e621232
154 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 a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely leveraging a client-side exploit or a phishing page.

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://yafferge.ru/wb?keyword=what In PDF document text
    • https://cdn.sqhk.co/sudidoxa/BrN8Lhh/screen_recorder_with_audio_game_screen_recorder_app.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/hcCiagh/uefa_champions_league_fixtures_round_of_16.pdfIn PDF document text
    • http://apsdd54gfv.xyz/que_es_cuadrante_en_geometriao58a7.pdfIn PDF document text
    • http://puliliraforuwu.22web.org/filovaliga.pdfIn PDF document text
    • https://cdn.sqhk.co/boxoveru/ghfMNha/45735066948.pdfIn PDF document text
    • http://wisitens.online/introduction_to_pragmatics_birnerhen2h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488581/normal_601c025eba9fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449397/normal_5fee34a60f107.pdfIn PDF document text
    • https://cdn.sqhk.co/jofijoju/Yggalzk/samezazapimo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414175/normal_5fc590d817b9f.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/idhdDjc/pejil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404987/normal_5fce9a490e60b.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/wizuluworafid/amazon_s3_bucket_size_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/dyson_ball_total_clean_vacuum_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/queen_size_comforter_sets_with_sheets.pdfIn PDF document text
    • http://fegifujeviba.epizy.com/animorphs_book.pdfIn PDF document text
    • http://fazafowunop.epizy.com/6391054940.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/kemisa.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_off0000edc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC3 5424 bytes
SHA-256: 9ce5972c8de19f74c54cfce8108eeeafc9e2812582c6b573fcd9ee7146c27875
font_01_sfnt_off00010054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10054 10680 bytes
SHA-256: 5efa5362edfc1ec415d900e3683bb4a5cb5b01bf9e2694df9e6862f1c3a8f542

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