Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb041cc4933fee81…

MALICIOUS

PDF

213.3 KB Created: 2021-04-01 13:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e40314c8647067f623b67595ef99083e SHA-1: e01cbb7cc63aac242491e0042c996a495be2d180 SHA-256: fb041cc4933fee81df0ffe1b8245739df84a36d0c2e8de325665fa201ca707f0
96 Risk Score

Malware Insights

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

The PDF file contains a lure for downloading software, indicated by the document body and an embedded URL. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a secondary payload or phishing content. While no scripts were directly extracted, the presence of external URIs and the nature of the lure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://golowaki.ru/wix?keyword=unreal+flash+3+swf+download
    • https://cdn.sqhk.co/pajerelo/Fge1bhe/wudovefoxonagubumupazarin.pdf
    • https://cdn.sqhk.co/leluforeref/gjghghc/ordinal_data_definition_geography.pdf
    • https://cdn.sqhk.co/bikegola/S4biaHQ/nomegekaburotobowageg.pdf
    • https://cdn.sqhk.co/lasesekov/aiiwthg/dare_you_to.pdf
    • https://cdn.sqhk.co/josedinis/hhhhiF6/jajosazepitekim.pdf
    • http://kozaredibedemok.iblogger.org/42338892635.pdf
    • https://cdn.sqhk.co/nobixapo/hff85ij/easy_drawing_tutorials_for_beginners_step_by_step.pdf
    • http://dronextactical.xyz/python_online_learning_platform9ofsv.pdf
    • http://mozuganimaf.66ghz.com/attracted_armature_type_relay.pdf
    • http://makikupake.iblogger.org/36759902056.pdf
    • http://vienvozvrat.site/83232654305eptm4.pdf
    • https://cdn.sqhk.co/libobivole/hchb7gh/battleship_game_apk.pdf
    • https://cdn.sqhk.co/fudikeraz/5G0hjPM/10251832663.pdf
    • http://alcexpress3.xyz/29235577665yh4l2.pdf
    • https://cdn.sqhk.co/pigevikuwi/j1t02ii/gasurisuvokeso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dakovupogoz.rf.gd/free_commercial_lawn_care_bid_template.pdf
    • https://s3.amazonaws.com/nafoxuda/skyrim_special_edition_mod_list_2021.pdf
    • http://menumizumiwasij.rf.gd/divisibility_tests_worksheet.pdf
    • http://mirepili.epizy.com/botany_for_degree_students.pdf
    • http://romudob.rf.gd/ligudutifof.pdf
    • https://s3.amazonaws.com/tamobalasu/monitor_cardaco_garmin_forerunner_35.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_off00030c53.bin
ca0015be4dcf6a518ea51d59bdf0c20d30ce6ae5c26ea769741d827c93d65dba
pdf-font-stream PDF embedded font (sfnt) at offset 0x30C53 5240 bytes
font_01_sfnt_off00031e35.bin
f2e0e3a935a88582c6ba233a827984c23c47932602651995cad0a0528cc6a883
pdf-font-stream PDF embedded font (sfnt) at offset 0x31E35 11508 bytes