Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1085a3560a4b05c…

MALICIOUS

PDF

73.0 KB Created: 2021-02-27 00:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 45904a907222279cf78de9360b46dc17 SHA-1: 7eaaae415c5fc7b5dc5a3f3f694beffcd429660b SHA-256: c1085a3560a4b05cc0c3034ad0107f648c7d63553385183e35d93670c12623bc
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=school+of+dragons+scientific+method+crossword+answers In PDF document text
    • https://cdn.sqhk.co/nuroteditu/fig5sid/amazon_music_unlimited_echo_show_8.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/c4u6Cfy/hd_wallpapers_for_computer_full_screen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_6037403a2fc77.pdfIn PDF document text
    • https://cdn.sqhk.co/zibavuna/jj9hbhd/english_song_2020_new_dj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450259/normal_5fec59321fd4f.pdfIn PDF document text
    • https://cdn.sqhk.co/ragebobeb/0WCigpG/momo_fake_video_call_joke_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414867/normal_602d4ba9bd34f.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/hdthdjd/43888316054.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/WKidhic/photo_video_maker_free_download_app.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvifilezaja/0xgexXF/75863804791.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://titesixa.rf.gd/nutafopav.pdfIn PDF document text
    • http://veduredetud.epizy.com/craftsman_electric_string_trimmer_replacement_head.pdfIn PDF document text
    • http://laletanegimiw.epizy.com/kojeninikidafelanel.pdfIn PDF document text
    • http://vozuxekeve.rf.gd/99542979320.pdfIn PDF document text
    • http://ratotepuno.rf.gd/teri_ankho_ka_ye_kajal_free.pdfIn PDF document text
    • http://gagonunanu.epizy.com/arpan_film_ka_song.pdfIn PDF document text
    • http://liwivudelaje.epizy.com/topic_sentence_worksheets_4th_grade.pdfIn PDF document text
    • http://judixipe.epizy.com/european_imperialism_in_africa_dbq_answers.pdfIn PDF document text
    • http://pupenedu.rf.gd/2011_ap_english_language_and_composition_free_response_question_1.pdfIn PDF document text
    • http://rivejekab.epizy.com/jurnal_bioplastik.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_off0000e0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A3 5628 bytes
SHA-256: b0c18cf4a4055ff62ef02cdbe404ccb2f5702d94198836c1eec77988882b7b28
font_01_sfnt_off0000f3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AF 10184 bytes
SHA-256: cbd3032bff2128d4db22dc0b44b22be0dfbdcf6af137858a9e9d2cca38e41d32

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