Malicious PDF — malware analysis report

Static analysis result for SHA-256 441bc811087834d2…

MALICIOUS

PDF

73.6 KB Created: 2021-01-24 07:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 918da079406cc928751b95b6878d0bfb SHA-1: 5081c894426149a7687a85a2619c879824077443 SHA-256: 441bc811087834d2439bcb0185cc9d685a7f3910dc9919a2b765648224a3cacb
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/wb?keyword=emergency%20management%20jobs%20colorado%20springs PDF link annotation
    • https://cdn.sqhk.co/gobuwovuv/7tWu5WP/nuwatuwixumagabu.pdfIn PDF document text
    • https://site-1204325.mozfiles.com/files/1204325/vafokiwudapaxeviz.pdfIn PDF document text
    • https://site-1172732.mozfiles.com/files/1172732/fewazepirofibanapuxenudo.pdfIn PDF document text
    • https://site-1253322.mozfiles.com/files/1253322/rigafazeko.pdfIn PDF document text
    • https://cdn.sqhk.co/levuzivanu/jghhcjd/download_war_conqueror_3_mod_apk.pdfIn PDF document text
    • https://site-1167927.mozfiles.com/files/1167927/70919509552.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/Lfigjhs/sleep_booster_sleep_better_apk.pdfIn PDF document text
    • https://site-1171133.mozfiles.com/files/1171133/shift_lead_interview_questions_and_answers.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/bededuxotulapil/bahubali_dj_song_naa.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/93546607868.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/long_e_sound_words_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/cambridge_celta_course.pdfIn PDF document text
    • http://medelomozukomav.epizy.com/44284657317.pdfIn PDF document text
    • http://melewurimepuja.rf.gd/french_numbers_1-_1000_in_words.pdfIn PDF document text
    • http://nopasemetefut.epizy.com/answering_machine_in_spanish.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_off0000e20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20B 5668 bytes
SHA-256: b76d6d5ac8753accda9dc517189118ef5dc147b2c8eb2824942a06637f547d6e
font_01_sfnt_off0000f545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF545 10700 bytes
SHA-256: 50708866cce1cf09742560f48ab10b3639468ae7567a8355cf19349cb35b9da2