Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9efe3978c2bfbf…

MALICIOUS

PDF

77.3 KB Created: 2021-03-24 01:32:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5e2530f8ed8a7fd82ce3ab21f8d4d68b SHA-1: c3adbd110b3701676f82e9f80c379e4797497af5 SHA-256: fb9efe3978c2bfbfc1595b0dd3846f735c8cd306a008ec1f90a41f7684a47c1c
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The presence of external URIs and a high-signal heuristic for SEO redirectors suggests a phishing or malware distribution lure, likely attempting to trick users into downloading a payload. The document body, though heavily obfuscated, contains references to 'showbox apk' and 'wkhtmltopdf', hinting at a potential lure for software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/wix?keyword=showbox+apk+for+android+2020 PDF link annotation
    • https://cdn.sqhk.co/xudekutof/LidwMii/47100094977.pdfIn PDF document text
    • https://cdn.sqhk.co/nujamuxeg/sjahhsC/descargar_best_sniper_shooting_hunter_3d_hackeado.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/WEdl7hg/plug_king_s_raid_vn.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/gcU8rUC/this_is_the_police_double_homicide_solution.pdfIn PDF document text
    • https://cdn.sqhk.co/zopinulepa/LDthjgg/20314462947.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/egijgjb/alchemy_arms_spectre_45_price.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/fojeOii/checkers_online_classic_board_games_with_friends.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/CgibKhb/86335726247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381539/normal_601596b6e4247.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/dbzjeie/fonts_emoji_keyboard_fonts_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/eicR3N4/91448262537.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/free_online_gre_prep_materials.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/ieIQgcG/31552117290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_600a52f283a9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427103/normal_5fe1cee417458.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/9dv7q2o/54511701806.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/ghghbTi/traffic_racer_extreme_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/dbihwjd/hide_rec_screen_recorder_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/jgidLgf/21299998014.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/8M9eykg/jaradul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bolirazebaf.myartsonline.com/assessing_student_learning.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/nurse_manager_behavioral_interview_questions_and_answers.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_off0000eda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA1 5660 bytes
SHA-256: 63f020e514ec1e223d221ae19381ca3b09803c7cdf0e7ea93225b9ff09e6de2f
font_01_sfnt_off000100f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F6 11004 bytes
SHA-256: 5d89daa7fa921c033ba10b4ff4b4b5a7c41ede97a5370b528547bf362f9abc36

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