Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d3c3f465e8d5c8…

MALICIOUS

PDF

79.1 KB Created: 2021-04-20 19:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4337a24a53e05990151a2a22c2a24853 SHA-1: 930c49c96965bb5715cb60e66ddd6af9fd6762bb SHA-256: 05d3c3f465e8d5c881bdcd1753513e60a55e2fbe637bca1756b4403b40c08cc9
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to cooking, possibly to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=what+can+i+cook+in+my+turkey+fryer
    • http://potaberukogox.66ghz.com/12496025165.pdf
    • http://kazotapojiwi.mywebcommunity.org/bundesagentur_fr_arbeit_stellenbeschreibung.pdf
    • https://cdn.sqhk.co/fexonawizoz/Kgfajey/meesaya_murukku_hd_movie.pdf
    • http://detonic-ordina.website/semi_circle_centroidzqxjh.pdf
    • http://rotefivalo.22web.org/ciencias_formales_y_fcticas.pdf
    • http://xatakafigudu.getenjoyment.net/17455817886.pdf
    • https://cdn.sqhk.co/dikonutudibe/ihNhjsl/tupagaremifulilimisuf.pdf
    • https://cdn.sqhk.co/nefikelifu/L95ijey/zewavugurekove.pdf
    • http://gagimubu.mywebcommunity.org/how_do_preschoolers_learn_through_play.pdf
    • http://bebalezuve.medianewsonline.com/affirmative_and_negative_words_in_spanish_worksheet.pdf
    • http://nadahul.ru/939901572624jgd4.pdf
    • http://xufamorazogubov.sportsontheweb.net/99481444086.pdf
    • https://cdn.sqhk.co/tixukiko/b4rgfhh/53191755172.pdf
    • http://bluetea.space/miwilababgj0r.pdf
    • https://cdn.sqhk.co/vopupevomate/0YieYg4/45893280546.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mewarur.rf.gd/44062034471.pdf
    • https://uploads.strikinglycdn.com/files/d476125b-88fb-4351-9767-e105d071ec2a/pasorisanujuman.pdf
    • https://s3.amazonaws.com/kodipopujufipig/following_directions_trick_worksheet_middle_school.pdf
    • http://zoxexikagu.rf.gd/42299133729.pdf
    • https://s3.amazonaws.com/xidulumexi/gotigi.pdf
    • https://uploads.strikinglycdn.com/files/67f904cc-8003-41ce-a4ea-19f530cdcfde/40791602887.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_off0000f922.bin
804353ed38d3fe705871e58e346ecd12705a12034a1e84af3054fe49c6d2f40f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF922 5092 bytes
font_01_sfnt_off00010a5f.bin
3b68d9f06dac00ab3150d2bb9ddc3e7328fec8bec355117c897cf901bbf41a31
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5F 10972 bytes