Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f43c734e79462a…

MALICIOUS

PDF

76.4 KB Created: 2021-02-24 07:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 824df766525ae367953d07d24ad5a957 SHA-1: e4fffd1a0b67129bfd72af678454fa0ced6e39e5 SHA-256: d8f43c734e79462a23eff3011f14cccd3f29d94b08a095c03fb95a5dfa606b2c
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the PDF heuristics suggest it is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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://jacksth.ru/strik?utm_term=how+to+set+charter+remote+to+lg+tv PDF link annotation
    • http://like-store.site/xeruratekisosowugibageka2a8ui.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401989/normal_5fe1c007a6bed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477139/normal_6011725da26ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458628/normal_5fc8283a97738.pdfIn PDF document text
    • http://mmuuue.space/ethical_hacking_and_cyber_security_t1d324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_601f6d66d2837.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425723/normal_5fce7a6ae9d5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/2016_camaro_ss_convertible_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/audacity_download_command_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/axton_solo_build_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/59156198772.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/sleep_inducing_guided_meditation.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/cisco_asa_firepower_threat_defense_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/66274569131.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5C 5328 bytes
SHA-256: cc250047b157ca434766e31b582971e41003160596eef1a45bef07c4a42ee068
font_01_sfnt_off0000fe69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE69 10876 bytes
SHA-256: c58a1362d7b4b2cbda3c8409966171e9bdd293de98f397ca86f9b08ec64b2883

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