Malicious PDF — malware analysis report

Static analysis result for SHA-256 d321c83cd4887a6e…

MALICIOUS

PDF

98.2 KB Created: 2021-03-01 04:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e7bd1bb0821aa97e3e476dd17e330817 SHA-1: 72a4170da9a7a7dd527bf97430fe9afd23cf9855 SHA-256: d321c83cd4887a6e25756c3ffa0a9ec4f55d9ed1ab3c708325a5e687b12b7bef
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a malicious domain. The document body, though heavily obfuscated, appears to be a lure related to a video game walkthrough. The presence of an external URI and the ML classifier's high confidence score indicate malicious intent, likely to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=metroid+prime+3+walkthrough PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490516/normal_601ecf14afa74.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/aGuiclL/17151743225.pdfIn PDF document text
    • https://tuxufinuzeleki.weebly.com/uploads/1/3/4/7/134737217/3430039.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386361/normal_5feef97558871.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365621/normal_5fff8122dc52c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416305/normal_603104e254973.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/favezaf.pdfIn PDF document text
    • https://salasusovalepeg.weebly.com/uploads/1/3/5/4/135401171/03bea21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/66463282112.pdfIn PDF document text
    • http://vakorizu.epizy.com/taxosunijodiwotilenu.pdfIn PDF document text
    • http://ferirapavo.epizy.com/greater_than_or_equal_to_sign_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/wiwomabavugaraleruge.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/23412602998.pdfIn PDF document text
    • http://devonefon.epizy.com/how_to_load_a_bosch_silence_plus_50_dba.pdfIn PDF document text
    • http://fidotetunuxezi.epizy.com/what_is_hollow_man_exercise.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/24180999917.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C0 4300 bytes
SHA-256: 2c13829dee5dda719be1f6bc1389cdce763eff9114d00ac3c1c922be72a0328f
font_01_sfnt_off00012fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD8 5296 bytes
SHA-256: 794c46b3407337254794406cf8e88c2c1f64f3646bb57e894c0f6619e46602ae
font_02_sfnt_off000141f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141F8 13372 bytes
SHA-256: 933290a15902e89512c32f3aa869ff15817e4cc81f2b8e45ad5f1687ce935e7d
font_03_sfnt_off00016d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D09 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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