Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c0e927b9e4be64…

MALICIOUS

PDF

75.6 KB Created: 2021-01-20 08:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ac1b381afc3fed9154e4b75f13ff4bf6 SHA-1: 9bb1b110a0bf4eb5fdf5c8bac5cc62a726d96c72 SHA-256: c7c0e927b9e4be64cbf389919d363950e5e0350c9f71846f96880ecc34678cf0
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are disguised as application forms, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a malicious document designed to redirect users to potentially harmful websites.

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
  • 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.
  • 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://maypoin.ru/123?utm_term=sentinel+and+guide PDF link annotation
    • https://cdn.sqhk.co/nejajevafode/i2Nifgg/stencil_art_spray_masters_online.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/cjuFtY6/hungry_shark_world_online_or_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/8lpgilv/jefuzowujexujamuzekegima.pdfIn PDF document text
    • https://fazolusafiwef.weebly.com/uploads/1/3/4/5/134585025/1524260.pdfIn PDF document text
    • https://pejivepomut.weebly.com/uploads/1/3/5/3/135339444/4a6c298d8ccc5e6.pdfIn PDF document text
    • https://wuginimujewege.weebly.com/uploads/1/3/4/7/134714977/pizajaxawuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/j0hdyv6/explorer_heyerdahl_crossword_clue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5fa403bfa11d5.pdfIn PDF document text
    • https://barigager.weebly.com/uploads/1/3/1/3/131398159/8529348.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/gjkgiha/21669903773.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/zjb0jgK/dezatavujukaripafabo.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/tuzamada/canadian_visa_application_form_uci.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/xowisadazuf.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/free_reading_for_first_graders_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/general_knowledge_quiz_questions_and_answers_online.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/proform_cardio_hiit_trainer_pro_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/savodebugemadilidoba.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/cartoon_love_song_whatsapp_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/clifton_primary_school_st_annes_ofsted_report.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE443 4824 bytes
SHA-256: 430c2673cc64d1faa3e99ebe3d03f139a6ee2fac9cd4d7c1d2ffaeb3579a3511
font_01_sfnt_off0000f4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B4 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000fd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD41 10544 bytes
SHA-256: 28d2a8d77c828e5ecc831fab56734a23c5e5e9f51e5bb656a1b6e743909dce10

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