Malicious PDF — malware analysis report

Static analysis result for SHA-256 721c78f14c245d4d…

MALICIOUS

PDF

75.6 KB Created: 2021-03-25 07:29:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 123c9af9688d47a20e4f4a25d23398f2 SHA-1: d5375e5381a480690e2879ee9aa3f9f5066ef3a7 SHA-256: 721c78f14c245d4d80a2dd66298fe62d86e58652995d0c1e72ec085884b70d65
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 an embedded URI pointing to a suspicious domain, which is likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to scientific research, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/award?keyword=genetic+basis+of+antibody+diversity+pdf
    • http://sovumeriwox.mygamesonline.org/josimotezo.pdf
    • http://noncomform.space/nixosifonafogevega6jyjm.pdf
    • https://cdn-cms.f-static.net/uploads/4479933/normal_604b917ba5e29.pdf
    • https://cdn-cms.f-static.net/uploads/4461497/normal_60242853b4832.pdf
    • http://grinallex.shop/clip_art_jamaica_flagp7gbj.pdf
    • http://hallop.xyz/barsat_film_song_videomsigf.pdf
    • http://poguzozod.sportsontheweb.net/basics_of_astronomy_and_astrophysics.pdf
    • http://burrrhey.tech/nafiposemunapofolezeiuhfx.pdf
    • http://beviluxenumiliv.mywebcommunity.org/what_is_a_3.0_mercruiser.pdf
    • http://artdebug.site/caballo_de_troya_descargarziila.pdf
    • http://discount50it.pro/assetto_corsa_vr_performance4pxiy.pdf
    • http://xutexukoxobofi.mywebcommunity.org/how_to_cook_salmon_in_air_fryer_toaster_oven.pdf
    • http://goldotzyv.ru/android_tv_oreo_x86_isobmdlh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2a6c20f5-091f-48b5-a5be-bf749919b1f6.filesusr.com/ugd/3794ad_4e23cfb455864f67bcf551de9148146b.pdf?index=true
    • http://femavumifixomud.rf.gd/c_s_lewis_the_problem_of_pain.pdf
    • http://vevubajiziju.epizy.com/71945152983.pdf
    • http://zejizarizigoz.epizy.com/afasia_sensitiva_y_motora.pdf
    • http://dapekafuxururo.myartsonline.com/how_to_calculate_pool_volume_in_liters.pdf
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_cdfdf37a8d8f42259d1527ccc147c9dd.pdf?index=true
    • http://wexoloxi.rf.gd/android_studio_3._1_gradle_console.pdf
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_c419552acd954e2d966fa094a8bf5b53.pdf?index=true
    • 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_off0000eb38.bin
38fdf7da5c74d94e782689e657b7a6134ccc68747371a6b8a07513322e444da2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB38 5452 bytes
font_01_sfnt_off0000fde0.bin
1cb08dc4be14694396ef4bc713d8da9475d7ab37aa39a2252131ab6035d3be4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE0 10244 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.