Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b71b00172bd3aee…

MALICIOUS

PDF

76.4 KB Created: 2021-03-28 04:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef38f9dfba2995e6dba485410d5f2088 SHA-1: e9cfcec28d9c6e96645132daf69538964880c85f SHA-256: 8b71b00172bd3aeee5965abba81fe237e36337f2001040388831ef4110827904
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs, one of which is presented as a search result for sheet music, a common lure for phishing or malware distribution. No scripts were extracted, but the presence of external URIs suggests the document is designed to redirect the user to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/award?keyword=canon+in+d+sheet+music+easy+pdf
    • http://kigirifaduguv.getenjoyment.net/annex_i_of_marpol_73_78.pdf
    • http://jekenufakewe.mypressonline.com/pdf._js_canvas_vs_svg.pdf
    • http://bikejesoxatelo.mygamesonline.org/31861293643.pdf
    • https://static.s123-cdn-static.com/uploads/4444123/normal_5ff4ce8dd7924.pdf
    • http://jujavekerubeko.scienceontheweb.net/angels_in_america_play_script.pdf
    • http://vugaganopofom.mypressonline.com/58720340438.pdf
    • https://static.s123-cdn-static.com/uploads/4416660/normal_5fff1a5ea676d.pdf
    • http://nakekizedexu.getenjoyment.net/2019_nissan_versa_maintenance_schedule.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rewepalazamiso/18462924952.pdf
    • https://s3.amazonaws.com/kuxuxemu/glencoe_geometry_answer_key_chapter_1.pdf
    • https://s3.amazonaws.com/xenavuxa/abs_plastic_sheet_suppliers_in_philippines.pdf
    • https://s3.amazonaws.com/wulotugadag/wivimata.pdf
    • https://s3.amazonaws.com/lotibabakuj/outlook_365_mac.pdf
    • https://s3.amazonaws.com/zowejunef/zujajoxoxirekonis.pdf
    • https://s3.amazonaws.com/mikibetiv/organic_chemistry_1_workbook_for_dummies.pdf
    • https://s3.amazonaws.com/jamuluvuvava/lapalu.pdf
    • https://s3.amazonaws.com/fofeguj/film_english_2018.pdf
    • https://s3.amazonaws.com/mokuwanibof/paxipafavopekadonakewuj.pdf
    • https://s3.amazonaws.com/kagedatabujo/performance_parts_for_bmw_m4.pdf
    • http://piwolimosopobu.myartsonline.com/supply_chain_management_chopra_solutions.pdf
    • https://s3.amazonaws.com/kakef/beyonce_coachella_performance_time.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_off0000ea77.bin
96ada77cef76f936ae205ad3b81411e19fd555842d116241a83b71b7d2881a6c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 5276 bytes
font_01_sfnt_off0000fc4f.bin
a5ee62e682ddc732ffea1f8a09e265487c839230737a3c6aaa04b0e08a6830c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4F 11244 bytes