Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c89769b8d9fe34…

MALICIOUS

PDF

205.6 KB Created: 2021-02-14 20:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 805a382811c0a1bdab836f3192ccc199 SHA-1: e41e7212497b0d7cdf4fdbd125829a4ea4b726d9 SHA-256: 74c89769b8d9fe343eac196f39197f3ed6977f5d7400aabcfc89a65c72a7e7ff
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a high-risk indicator by ML classifiers and ClamAV. The document body, though partially corrupted, suggests a lure related to 'Asu professional learning library modules'. The presence of external URIs and the ML/ClamAV detections strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://maypoin.ru/123?utm_term=asu+professional+learning+library+modules PDF link annotation
    • https://cdn.sqhk.co/mifigatira/jaTKjiv/vitacost_biotin_reviews.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413702/normal_5fcaa867afba9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485822/normal_5feed6b4ad6d6.pdfIn PDF document text
    • http://ninozefumuwu.iblogger.org/aspentech_annual_report_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388839/normal_5fe976d0dcc86.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/f1jbRKa/extreme_car_driving_simulator_download_uptodown.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458852/normal_6019270c06121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408333/normal_6019ae5b2041f.pdfIn PDF document text
    • http://dezunajuvuzen.22web.org/tamil_dubbed_action_movies_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/hiPeifc/dragons_of_atlantis_heirs_of_the_dragon_tips.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492529/normal_6015d76f82478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_60205067609f9.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/ngeihsI/sub4sub_pro_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484815/normal_5fdc27bb845bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vodupuginotipir.rf.gd/american_lottery_application_form.pdfIn PDF document text
    • http://sejisetelasisel.epizy.com/birthday_card_template_funny.pdfIn PDF document text
    • http://lobakixadob.epizy.com/5991516666.pdfIn PDF document text
    • http://tusajemepo.epizy.com/56811260373.pdfIn PDF document text
    • http://ditatunejapazik.epizy.com/my_guided_access_won_t_turn_off.pdfIn PDF document text
    • http://keladuwuk.rf.gd/catia_v5_drafting_tutorial.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_off0002ea6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA6D 5592 bytes
SHA-256: aea3697bae4fd4555ce9038bb86dc75e22581e692b99a979b513ae322c8c68c3
font_01_sfnt_off0002fd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD68 12636 bytes
SHA-256: bb9954911a11f6cbbbac402f1fafcbad1f16a5d497a4c91d113e743fae0c320f

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