Malicious PDF — malware analysis report

Static analysis result for SHA-256 187919b5dd106275…

MALICIOUS

PDF

76.8 KB Created: 2021-02-28 08:25:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cde7da293fa4201506c47bda29cc3c65 SHA-1: 10ded1396b59026017fd05f72f08cbc904b0bb78 SHA-256: 187919b5dd106275fc8f60e380d04fae48581db4b75dc029e691914178c7053d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a malicious domain, disguised as a beginner's guide to MacBooks. ClamAV and ML classifiers have identified this file as malicious, specifically a phishing trojan. The presence of external URIs and the overall classification strongly suggest a phishing attempt designed to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/123?utm_term=how+to+use+a+macbook+for+beginners PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375195/normal_60354cde0a435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418199/normal_601d5143dc409.pdfIn PDF document text
    • http://weareanonymous.org/lazilowejovagokuvofo76jn3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415929/normal_5fd711d730324.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387931/normal_5fc9668fabe97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391893/normal_5fecca1feb6bf.pdfIn PDF document text
    • http://koprovk.xyz/stage_performances_crossword_clue9pxjs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_60153cbd203a3.pdfIn PDF document text
    • http://itayoga.space/lion_kingdom_hero_king_adventure_run_jump_jungler8nrxz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413986/normal_5fd629c664ea0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488555/normal_602ae5c758874.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/kezemiradigu/jitaze.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/83163951334.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/water_bill_receipt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/8894865438.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/in_house_counsel_salary_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/aqa_a_level_sociology_education_revision.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/gangstar_java_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/tamil_new_audio_songs_free_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/clarinet_solo_free_sheet_music.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_off0000ef64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF64 5428 bytes
SHA-256: b833ae7c3797ba4b90faf73ab644513464f6f10de3b06fe37c41a016eda8bf28
font_01_sfnt_off000101dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DC 10620 bytes
SHA-256: 0dc6162bd49aa748f5d2b8a9efaab309ad6bbcc8fa2cd06e18d184e0d9326458