Malicious PDF — malware analysis report

Static analysis result for SHA-256 0086d00fecf14bda…

MALICIOUS

PDF

75.3 KB Created: 2021-03-25 16:37:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f05be03532773cc056d4ed63915a25c SHA-1: 80e22bd3196b751af9eadbce1fd80db590624328 SHA-256: 0086d00fecf14bda3dcc160d461be524dafe0c23fbcf7036b53a11bb6d182124
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 URL pointing to 'resalured.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Monsters Inc worksheet answers', indicating a social engineering attempt to trick the user 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://resalured.ru/wix?keyword=monsters+inc+worksheet+answers
    • http://vovpomnim.ru/gubedotikoleninobuzq8p2d.pdf
    • http://warupipujamoru.sportsontheweb.net/sojozogixolo.pdf
    • http://stassikorskyi.com/ronco_showtime_rotisserieb7daf.pdf
    • http://vevujegijozu.iblogger.org/27793380820.pdf
    • http://znakomstva69.space/bowmasters_mod_all_characterspez5z.pdf
    • http://pojibuvuj.mygamesonline.org/orange_county_school_calendar_2020_18.pdf
    • http://zagavexakagin.mypressonline.com/rangkuman_biologi_sma_lengkap.pdf
    • http://dololebajug.scienceontheweb.net/lakas_atenista_civil_procedure.pdf
    • http://edayafar.xyz/netgear_jgs524pe-100eus_prosafe_plus_gigabit_switch_with_poe3tjrt.pdf
    • http://keluzizizeroki.getenjoyment.net/kodozexalesad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_0d0dc17ffb83465986071be22a6688f5.pdf?index=true
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_d2e3a6622fc140769ca54a40a0e5555f.pdf?index=true
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_ff10e957dcbd4079ac62b143281fba3a.pdf?index=true
    • http://jevoneloz.epizy.com/financial_statement_analysis_project_sample.pdf
    • http://wofeduvep.rf.gd/vietnam_labour_law_2020.pdf
    • http://muvalinifotu.rf.gd/consider_contemplate.pdf
    • http://xopozajuve.epizy.com/22987528705.pdf
    • http://nimozan.epizy.com/zemilifojo.pdf
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_f1afb72179794d76a17c17f1fe1565b0.pdf?index=true
    • http://jiwamig.rf.gd/gusopo.pdf
    • http://gotazuvibidok.epizy.com/m._a._a_ki_full_form.pdf
    • https://f85e9a30-dbb9-40fd-a66d-53bd7daafe07.filesusr.com/ugd/1b9faa_7c6e9edaec9e4887b83cc573e3f62ea1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9de.bin
ccf9fb892202b4bb2088ce8142a4053323d469e40edb26319e9635fab615566c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DE 3352 bytes
font_01_sfnt_off0000e5de.bin
cb539a6684d14a161a4e6d4118dc3a2e4e17602343c1e5fa484e107ff2a7593f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DE 5016 bytes
font_02_sfnt_off0000f709.bin
898b533cc8cf55c96a3327f80327349f86278f0c14be91f331d4103354e6bf1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF709 11508 bytes

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