Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8b5e6b0f2b267c…

MALICIOUS

PDF

65.5 KB Created: 2021-02-12 20:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 49c606e2538fe6ef9b163e75db493ca0 SHA-1: b75bbab72b5078d39d0e04725e4cedddf9f504d1 SHA-256: dc8b5e6b0f2b267c1af23f60c432aa44184e39680cd473bf50a545c95d1583cb
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://druttle.ru/wix?keyword=the+practice+of+statistics+2nd+edition+answers PDF link annotation
    • http://dorightpress.com/smart_connect_ipad_keyboard4dkis.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/iBk6Cid/shuddering_meaning_in_tagalog.pdfIn PDF document text
    • https://cdn.sqhk.co/jinatopa/hezjehe/sure_shot_gun_range_nc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486356/normal_5ff2a8f802268.pdfIn PDF document text
    • https://cdn.sqhk.co/toralapiluw/ggHjbhd/smashy_road_2_key_clown_car.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/gchfjfn/photils_hashtag_generator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_6017204764ef7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409244/normal_5fd06a92519b9.pdfIn PDF document text
    • https://cdn.sqhk.co/fijufupuga/2ghFWvF/exonerated_definition_thesaurus.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/fuwuzerijofa/population_ecology_homework_study_guide_answers.pdfIn PDF document text
    • http://fusatepalu.epizy.com/renok.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/hearthstone_arena_guide_october_2019.pdfIn PDF document text
    • http://fugewep.rf.gd/mejozagurutejogijom.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/online_video_player_free_for_pc.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_off0000c4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DE 5384 bytes
SHA-256: 61e6e1aaceb3b4a7afa825cbcfdf12d26738a759f665e895f0003f1a6439177e
font_01_sfnt_off0000d73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73A 9888 bytes
SHA-256: 5ed7e5643dae1147f6f3aa50258d552e2b25cd3a92c3cb0389fe71f63b805299