Malicious PDF — malware analysis report

Static analysis result for SHA-256 89670f880c974968…

MALICIOUS

PDF

78.3 KB Created: 2021-03-19 05:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efabaabeaedf64ec6417fb307698f0fd SHA-1: d69b8cf2c2a285f0206a827e55f0637c84fc835a SHA-256: 89670f880c9749688e62c05c0ff1c060c979c730ac7942dabb20853e91488b6e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an external URI pointing to a suspicious domain, likely intended to host malicious content or redirect the user. The document body, though heavily obfuscated, suggests a lure related to 'aliphatic amino acids pdf'. No scripts were extracted, but the presence of an external URI strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/award?keyword=aliphatic+amino+acids+pdf
    • http://fuvesozufinefi.medianewsonline.com/ejercicios_aerobicos_y_anaerobicos_ejemplos.pdf
    • http://lofajemami.sportsontheweb.net/36560431446.pdf
    • http://tadolonelo.sportsontheweb.net/61362882725.pdf
    • http://zotikarida.medianewsonline.com/86923255370.pdf
    • http://kexedeziferu.sportsontheweb.net/charter_remote_without_setup_button.pdf
    • http://lumogodasekepi.mypressonline.com/ielts_academic_reading_sample_questions_and_answers.pdf
    • http://dafesoxexigu.medianewsonline.com/nolorujeboniloxemirazitar.pdf
    • http://xoroketogejuxe.mywebcommunity.org/61133442070.pdf
    • http://vaxiliwu.medianewsonline.com/kuluwap.pdf
    • http://ruluzuzadol.mypressonline.com/51690725494.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jixonolalosixew.rf.gd/how_to_setup_cateye_velo_7.pdf
    • https://s3.amazonaws.com/megulu/shazam_music_apkpure.pdf
    • http://fokogemuzaraw.epizy.com/cascode_amplifier.pdf
    • http://widifusi.myartsonline.com/41817586063.pdf
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_9787d1348c41445ea07a9be336aae17e.pdf?index=true
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_225d8b5500884b3dbaf62045e3ed4ecf.pdf?index=true
    • http://gupatevefojip.myartsonline.com/neoplasia_benigna_e_maligna_diferena.pdf
    • http://vuvevuzipag.rf.gd/agricultural_engineering_reviewer.pdf
    • https://b73b9701-b1df-43be-b031-73419f87697c.filesusr.com/ugd/bfbd96_ae18a7b6446b422a806416de26f455ab.pdf?index=true
    • http://rogomore.myartsonline.com/kyocera_fs-1120d_user_manual.pdf
    • https://s3.amazonaws.com/kigavanus/74501380327.pdf
    • https://s3.amazonaws.com/vigevot/dell_latitude_e6420_service_tag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e910.bin
4b86b95f00631c01e61e201d3bdd291458c8f4d6c587a5c398857112005a30e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE910 4960 bytes
font_01_sfnt_off0000f9b4.bin
1a300d7ffc30ce865450715aaa701c56813117addf4db9cd9e8a0ccf4210da9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 10464 bytes
font_02_sfnt_off00011d50.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D50 4324 bytes

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