Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb86a373e10829af…

MALICIOUS

PDF

87.9 KB Created: 2021-05-13 01:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e4612137f349ad2afeb895b8986127e SHA-1: 7fb9e727fc63c45464f47755aee29ec3cea10688 SHA-256: eb86a373e10829af8105931855a3a17d29ff5f38e85f272656e3f870620f972e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, indicating a link farm designed to direct users to potentially malicious websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to distribute malware or conduct phishing operations. No scripts were extracted, but the overall structure points to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=can+you+learn+electrical+engineering+at+home
    • http://thiswaytovogue.com/mega_construx_game_of_thrones_battle_beyond_the_wallbzxzk.pdf
    • https://jadimakadafi.weebly.com/uploads/1/3/4/3/134378671/kolefikemuku.pdf
    • http://makeyourself.xyz/46969395000l0mq5.pdf
    • https://nupuwumot.weebly.com/uploads/1/3/5/3/135305030/fb62e933cc3a55.pdf
    • http://bugiwuxad.medianewsonline.com/definisi_autism_spectrum_disorder.pdf
    • http://familyit.pro/marine_radio_frequencies93xui.pdf
    • http://naturmilans.fun/biostar_2_clientico6t.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b58bbc46-0836-41c1-8930-a9e8682448dc/greek_god_names_male_generator.pdf
    • https://s3.amazonaws.com/welanisowari/muzilisafa.pdf
    • http://vajapojaperusu.myartsonline.com/kugibib.pdf
    • https://uploads.strikinglycdn.com/files/356bdd56-0f36-4671-a6fb-bfeb35e99aa2/how_to_refill_ink_cartridge_hp_650.pdf
    • https://uploads.strikinglycdn.com/files/04c0c78a-fc20-4f15-a358-112cb5ff61d2/promotion_points_lotro.pdf
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_f46efb037b0140ac8f8b3fe274563134.pdf?index=true
    • http://viwuwijagabote.myartsonline.com/problem_solving_exercises_for_high_school_students.pdf
    • https://s3.amazonaws.com/lizuseguwix/88594585165.pdf
    • https://s3.amazonaws.com/nitirew/can_the_dash_diet_lower_blood_pressure.pdf
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_ce1ff3dcf7094476862665e1cebbc9b4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/45a35462-a4b2-471b-8989-bee63ba68612/41267358185.pdf
    • http://bebovufuvuji.myartsonline.com/tutorialspoint_asp.net_core.pdf
    • http://pabizex.atwebpages.com/3100705931.pdf
    • https://s3.amazonaws.com/guwutivupudutu/dominos_garlic_sauce_ingredients.pdf
    • https://uploads.strikinglycdn.com/files/fbe11101-9c62-4ec9-99f1-bb46f48fb2fa/girl_scout_animal_helpers_badge_requirements.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b37.bin
ba7f4c48574d5487edea8ea4c69fd81cd0c2ecab24db7f48b4263f2354330bfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B37 5040 bytes
font_01_sfnt_off00012c39.bin
0c0bcf22deb5402a13fb7c3542da155383d4141ed4bc4de172b2d942f614fc2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C39 11468 bytes

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