Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7e794a93a68277…

MALICIOUS

PDF

80.0 KB Created: 2021-04-04 00:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8d35b9b3197de7171d69a7b0410bd69b SHA-1: 9727f2b50de3907ae2d786840d1ab5614ed17d38 SHA-256: 0c7e794a93a68277213c5c1957fb2fbbb4ae1e4aabdc2b4505925c77e46e076b
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'druttle.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to academic materials, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://druttle.ru/award?keyword=complete+ielts+bands+6.+5+7.+5+teacher+s+book+pdf PDF link annotation
    • https://cdn.sqhk.co/vaxikinanibu/LheVfC1/75273309985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454432/normal_600f95d587264.pdfIn PDF document text
    • http://kowuterada.mygamesonline.org/tn_election_commission_voter_list_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/meletadugox/hhetijh/70071388369.pdfIn PDF document text
    • http://wildboost.club/here_i_am_lord_scripturefz6mb.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/xesuwepewinu.pdfIn PDF document text
    • http://copyrightproblem.com/personal_questions_to_ask_a_guy_about_his_pasts00nx.pdfIn PDF document text
    • http://trokot-newshop.online/pamisezakuneromumuridobf3q6.pdfIn PDF document text
    • http://viwoxufegoger.sportsontheweb.net/english_to_arabic_common_words.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/cwWcjdR/air_jordan_1_mid_chicago_black_toe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_6024baef5f736.pdfIn PDF document text
    • https://cdn.sqhk.co/xixofivib/gEZFsif/google_play_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495050/normal_5fe020b0552d7.pdfIn PDF document text
    • https://cdn.sqhk.co/dedesonor/hajbUgc/fosapekikipapasifixigoni.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/96540118736.pdfIn PDF document text
    • http://myshoes.moscow/xofesemesufebifanik3z7xg.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/tolivajupeku/are_kohler_shower_heads_interchangeable.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/chinese_calendar_2013_baby_gender_predictor_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/how_to_get_passive_perception.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc0a26b4-a752-4835-8e63-c86bdab70406/wemizovuzuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7922434d-1011-40ed-84a3-b7b2872270f0/what_are_words_the_piano_guys_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/b_flat_clarinet_sheet_music_easy.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_off0000eb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB79 5892 bytes
SHA-256: 4bc66b5aa714751908630eed4c4c3f2543c3d348df2dae3e811e91203ebebca9
font_01_sfnt_off0000ff61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF61 22252 bytes
SHA-256: 9e66bf1a91db2548fa81d39f31e7c1334f11baf888614a0b84ca43c812e65fea

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