Malicious PDF — malware analysis report

Static analysis result for SHA-256 498ba96246311963…

MALICIOUS

PDF

70.6 KB Created: 2021-02-14 09:09:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6319dda2552d8149b42dcc35ad8b0e89 SHA-1: 20ca69dfe797024e7271e1ca774a9fb2e7cfa414 SHA-256: 498ba96246311963b9ad51c9f70befdc11082fb0d0139d61560c7447d905bf98
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://crophysi.ru/wix?keyword=ap+chemistry+gases+free+response In PDF document text
    • https://static.s123-cdn-static.com/uploads/4377902/normal_5ffcaa4cbffae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453747/normal_60050f6f2fb95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410965/normal_5fd1b10ef072b.pdfIn PDF document text
    • http://zojidetamosab.iblogger.org/nojafetojimosemeguxuzexel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417997/normal_6003d082a75d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390324/normal_5fe1d048716c9.pdfIn PDF document text
    • https://cdn.sqhk.co/kelufuro/gz6jbhj/megamind_costume_for_baby.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421339/normal_5fd6808ae94b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417406/normal_6003963118bf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_600cc5fa82d46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382209/normal_5fc6826bec8b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5fe20a0080140.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367922/normal_5fef7acdb8bb0.pdfIn PDF document text
    • https://cdn.sqhk.co/libarazituw/ichi4ja/sutiwazuwexomoramomebe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408584/normal_5ff514e10e711.pdfIn PDF document text
    • https://cdn.sqhk.co/bojowagawire/fgEYpPc/carnival_games_ps4_game_list.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/ladiwuzetawedi/27768123777.pdfIn PDF document text
    • http://retexibew.rf.gd/scientific_notation_chemistry_if8766_answer_key.pdfIn PDF document text
    • http://fizefitelibulob.epizy.com/xevafawegediwati.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/answers_for_why_you_want_a_job.pdfIn PDF document text
    • http://ribizotujigotok.rf.gd/ayushman_bharat_hospital_list_in_mp.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_off0000d72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72A 5488 bytes
SHA-256: e4f4f48cb0cf1c753a69f8fb7a3354988f4eb8f76cf7a57eb4c3ce521260677c
font_01_sfnt_off0000e9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BB 10412 bytes
SHA-256: 3f434f047b9a5167030e61895beff476ecbcac7b84019b6a5ef2f1e46077a428