Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e3b794f17eb742…

MALICIOUS

PDF

97.6 KB Created: 2021-03-15 13:42:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59153d81d05ed46fc0be85bb8a0d05fa SHA-1: e34c7e857c4c76fa2b7da2b88d5007a356c0a2e0 SHA-256: 92e3b794f17eb7429b62ced797c34dd861e5bd29a4a8292d3a2c899be3ad8da1
136 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of an embedded URI pointing to 'pelibifir.ru' and the heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggest the document is designed to trick users into downloading a password-protected archive, likely containing a secondary payload. The document body, though heavily obfuscated, contains text related to 'Amharic books free pdf download', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pelibifir.ru/award?keyword=amharic+books+free+pdf+download
    • https://cdn-cms.f-static.net/uploads/4459185/normal_601ad79c92984.pdf
    • https://static.s123-cdn-static.com/uploads/4451210/normal_5fded83825704.pdf
    • https://cdn-cms.f-static.net/uploads/4404727/normal_6035736136d96.pdf
    • https://cdn-cms.f-static.net/uploads/4476768/normal_601b474067d9f.pdf
    • https://cdn-cms.f-static.net/uploads/4446642/normal_604b8f84cc4d1.pdf
    • http://waliwosodumobu.iblogger.org/xevegufuludumugovo.pdf
    • https://static.s123-cdn-static.com/uploads/4484126/normal_6006c5eeb712d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c4674924-6fc5-402b-8cdc-11d771534520/sijibezav.pdf
    • https://uploads.strikinglycdn.com/files/3eb1aa34-5949-4e9d-ac18-4006b89245d2/4465886404.pdf
    • http://pidezesu.rf.gd/fourth_grade_spelling_words.pdf
    • https://uploads.strikinglycdn.com/files/c2c2c9c7-2b37-4a5f-98b7-b6280451495a/pegavabujelajafujimij.pdf
    • http://wovogaxix.epizy.com/what_to_do_if_you_forgot_ipod_touch_password.pdf
    • http://gawebunopom.rf.gd/android_auto_app_google_play_store.pdf
    • https://uploads.strikinglycdn.com/files/be4dc7e3-096f-47d5-812e-f2f53c12d367/unlimited_power_meme_hangover.pdf
    • https://uploads.strikinglycdn.com/files/d518c082-3e70-4128-a56b-fe7f2e833964/small_appliance_repair_shops_near_me.pdf
    • http://vetarobafawuk.epizy.com/kapeg.pdf
    • http://sudemididesiz.epizy.com/bodezusanatelavolu.pdf
    • https://uploads.strikinglycdn.com/files/3116ab01-5243-4101-8619-a27fdabb1f57/barnes_and_noble_i_spy_books_for_toddlers.pdf
    • https://uploads.strikinglycdn.com/files/3767900b-dcd3-452c-817f-d041a5532041/danby_ddr050bgwdb_50_pint_dehumidifier_-_white.pdf
    • http://xilibosukotijob.epizy.com/syringoma_adalah.pdf
    • https://uploads.strikinglycdn.com/files/db966002-0a7f-4eea-a3e1-4779b71b458b/vovilexu.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e86c.bin
2a4e81e8245993229b7ebb158e1b0004be304bff66ff1d906d0eabf6437c8fcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE86C 32552 bytes
font_01_sfnt_off00013f9d.bin
24d93cc5a423028aa348eeda61bcfbb1b859d7bbd2baf374e056e1e6ba814c9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9D 5680 bytes
font_02_sfnt_off000152d9.bin
11cae471cc1a14b05ae26bdc92d7fa7823c3f19d9e3b0b77385a7ad333ea56cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152D9 11016 bytes

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