Malicious PDF — malware analysis report

Static analysis result for SHA-256 084d3e898da7a5f0…

MALICIOUS

PDF

72.6 KB Created: 2021-03-21 00:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af9830b9d3a5c492ffa129c3d2cef807 SHA-1: da3bb02901cc1dc4c9a14feb4b3a05e600874956 SHA-256: 084d3e898da7a5f0af0a52bd77973c1b199a8360301ef6257f792ddd63177281
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to academic content, likely intended to trick users into visiting the malicious URL.

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://jacksth.ru/wix?keyword=ap+human+geography+chapter+5+key+issue+4+answers
    • https://static.s123-cdn-static.com/uploads/4469119/normal_5fcc9d0a63c78.pdf
    • https://cdn-cms.f-static.net/uploads/4482645/normal_60386b9b49c06.pdf
    • http://brumbum2.xyz/advertising_agency_nycumwm1.pdf
    • https://cdn.sqhk.co/serodozire/Q7hgYhh/xixumupemower.pdf
    • http://zijixiteluwek.scienceontheweb.net/my_fathers_dragon_movie_in_english.pdf
    • http://shoop-fg.ru/91657237077zibj9.pdf
    • http://useraisins.pro/burnham_boiler_tech_supportd02du.pdf
    • https://static.s123-cdn-static.com/uploads/4370055/normal_6007b74189af1.pdf
    • https://static.s123-cdn-static.com/uploads/4445116/normal_60076194176ea.pdf
    • http://gnfcns.info/monkey_madness_1_quick_guide_osrs9yrnf.pdf
    • http://fafikup.scienceontheweb.net/gupadebagovuda.pdf
    • http://mumijivamivaxij.medianewsonline.com/zimagalomepam.pdf
    • https://static.s123-cdn-static.com/uploads/4366389/normal_5ffaf141858d7.pdf
    • https://cdn.sqhk.co/sewuvavimebi/pwV95ji/virus_scan_failed_2020.pdf
    • http://dogalijun.scienceontheweb.net/the_boy_in_the_striped_pajamas_book_characters.pdf
    • http://nukicew.xyz/wodumakexutavowuvomokj4up4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/serogajugomiji/safolebirenegilinemin.pdf
    • http://wutorokanotomav.onlinewebshop.net/tusoxezagilabibiwajinoj.pdf
    • https://s3.amazonaws.com/jolituzoji/how_to_install_dishwasher_bosch.pdf
    • https://s3.amazonaws.com/tabobujimo/5180290577.pdf
    • https://s3.amazonaws.com/fajeloninesitel/crystal_reports_designer_for_visual_studio_2013.pdf
    • https://s3.amazonaws.com/minaxigevani/how_much_does_it_cost_to_exchange_sodastream_carbonator.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_off0000d93d.bin
b2ad38728a11a1a03f0717c5a429344e11f3021f5a95b5b8a2def2d51d8853ef
pdf-font-stream PDF embedded font (sfnt) at offset 0xD93D 5772 bytes
font_01_sfnt_off0000ecdd.bin
d747302cb5baa469f99e41cead986d3c22ce11d2d944e0471eeeedcaf2de61e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECDD 11112 bytes