Malicious PDF — malware analysis report

Static analysis result for SHA-256 c73a0d64ab896691…

MALICIOUS

PDF

64.8 KB Created: 2021-01-26 08:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 949ad69ce5dcd1167db884e3c8976997 SHA-1: b9d9bbb2cbfde381cc3a3f0b000404d4924f9709 SHA-256: c73a0d64ab8966914b1400b98c60c2205a747ae442f8c6f92862ea0e9f6471dc
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, suggests a lure related to educational materials, likely to trick users into clicking the malicious link. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/123?utm_term=pearson+geometry+textbook+chapter+6 In PDF document text
    • https://cdn.sqhk.co/romilononove/jaheBs8/mulibutikowawe.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/Vgheij5/potela.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/otOftje/fatal_fury_mark_of_the_wolves_dreamcast_review.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/HhjigaW/emergency_firefighter_rescue_simulator_911_games.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/hgrmQhj/pulse_secure_login_problem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416500/normal_5fd3cb2d3df7a.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/GRDChaW/download_game_ultimate_shark_simulator_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/2hglQhe/27070551761.pdfIn PDF document text
    • https://cdn.sqhk.co/kubibosujiko/gcaElgi/among_us_free_chromebook.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/tiejgKZ/virginia_tech_women_s_basketball_head_coach.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/j4iajfJ/online_multiplayer_browser_games_to_play_with_friends.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461525/normal_5fe045854702f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365541/normal_5fce66a95e260.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381988/normal_5fdca5dba820f.pdfIn PDF document text
    • https://cdn.sqhk.co/sikereri/hg8psgh/27550227422.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bisiziwaros.epizy.com/63631213528.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/naluna.pdfIn PDF document text
    • http://xewenofos.epizy.com/cracked_games_for_linux.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_off0000bd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD49 5844 bytes
SHA-256: d9bbe4a17f05387405007822d5d88cae5c36e6d06684820d102771fe514bd380
font_01_sfnt_off0000d115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD115 10824 bytes
SHA-256: 93e9e1132772bd96991618a4451829eb3125216fc4312d80f982b358b24acf9d

Open this report in the interactive analyzer, or submit your own file for analysis.