Malicious PDF — malware analysis report

Static analysis result for SHA-256 790c5d80dfa4e7e8…

MALICIOUS

PDF

71.5 KB Created: 2021-05-28 07:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00f729577eae0c7aae6c9aeab4c859c8 SHA-1: 9323906acd7eece39024e977933033530daae217 SHA-256: 790c5d80dfa4e7e8edc47a08258664c8e5104552457e4749d5c4b7dba44db9cc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains a lure to download an APK file, as indicated by the document body and the embedded URL. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, limiting the analysis of specific execution behaviors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://eobliecky.sk/userfiles/file/77222712233.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/7407397c1b247bd898f05e61d32cbb03/setolasubowo.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608797c90e0c2---sefufaledizufo.pdf
    • http://autoshiftbid.com/fckeditor/userfiles/file/446965332.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/7jheu70kguhqqfbigebathl4nm/tamima.pdf
    • http://meble-tk.pl/userfiles/file/52222347841.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/b76366cea2383903d220c4f40a319516/44707734839.pdf
    • http://applexin.com/ttpsea/files/file/56989664838.pdf
    • https://istocdukkan.com/userfiles/files/97801927211.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa45cd0ec7---notetofepef.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/c21321ef854001f5fa813168ac0120e3/75140297976.pdf
    • https://condominiovillage.com/userfiles/file/barifosevozabibuzexututej.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5732cbf80---33505176626.pdf
    • https://lamaisonducoeur.ca/upload/editor/file/88579726124.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609165d56cc19---28985047888.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087b018986fe---65100428075.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=download+apk+cheat+coin+dls+2021
    • 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_off0000dc85.bin
79baeb956b74c06681fcbf83175326f867f96ad3d906aa1046579daa048b8145
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC85 5548 bytes
font_01_sfnt_off0000ef85.bin
8e11ea60a404741a236655684797daf8927e76478658247ebd766d1a6eb48827
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF85 9936 bytes