Malicious PDF — malware analysis report

Static analysis result for SHA-256 41fda4f22e249240…

MALICIOUS

PDF

77.1 KB Created: 2021-03-29 04:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71b8093b57a25fd310483289683258ea SHA-1: 492429b4c084422dd9316e4a8ca449267e1b9ea4 SHA-256: 41fda4f22e24924001b5ad059a73efdabbfb89e303aaf2f3c6fc313d548e3c81
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely a lure to download a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/wix?keyword=cellular+respiration+worksheet+biology+corner+answers
    • https://cdn.sqhk.co/xajamenujo/ieFhfnO/wasafisifubutasagafofok.pdf
    • https://cdn.sqhk.co/kapipota/jaINum2/84643898771.pdf
    • http://trikotoria.ru/xogexatubexamatakidufru4.pdf
    • http://lnstagramcopyrigtservice.com/92617192653ymz7o.pdf
    • https://static.s123-cdn-static.com/uploads/4419851/normal_5fc7f3b78cb8f.pdf
    • https://cdn-cms.f-static.net/uploads/4406793/normal_6020862ed391f.pdf
    • https://cdn.sqhk.co/sarowojep/fihjhJ3/beeny_rabbit_adventure_world_apk.pdf
    • https://cdn.sqhk.co/tememukafosu/jsifAjf/audience_analysis_in_communication.pdf
    • http://devlp.club/how_to_be_a_child_care_centre_manager21xm6.pdf
    • https://cdn-cms.f-static.net/uploads/4450884/normal_604de94726e15.pdf
    • https://cdn-cms.f-static.net/uploads/4485930/normal_602bf1f856fd3.pdf
    • https://dapavivilo.weebly.com/uploads/1/3/4/8/134895477/buxalovemow-nubapotipisiw-koxawekopi.pdf
    • https://sutesesa.weebly.com/uploads/1/3/4/8/134871168/jiwawubomisanav-bakoziju.pdf
    • https://widosutolitidaf.weebly.com/uploads/1/3/4/8/134847614/gizij_satitum_fufer.pdf
    • http://tvoy-ogorod.online/kuvolejatalivuwedatoougsu.pdf
    • https://cdn-cms.f-static.net/uploads/4499283/normal_60358b51d9ca9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cac09fc1-eaa3-400d-8b1b-85dd1175fbc6/powerflex_4m_f013_fault.pdf
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_e0916c4f89a648fbb36c54f69f876956.pdf?index=true
    • https://1a73feee-b327-4bc5-ac54-9d367b44a425.filesusr.com/ugd/226baa_ff8e4e3dedd74e89b4e9ec637ab30b8e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/401d1b39-a729-4ad7-a948-8c90b37956ea/besidedofimizenenijexe.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_off0000eed7.bin
513d1467167ed5f1b118760b96edc11b6329cb71de2053a3854abf05209b5eec
pdf-font-stream PDF embedded font (sfnt) at offset 0xEED7 5496 bytes
font_01_sfnt_off0001019d.bin
7cd7e80c0ed8838fbf9496186cf91c42ceb6f8b00bdb1cd826810b9e5a7f2ba6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1019D 10968 bytes