Malicious PDF — malware analysis report

Static analysis result for SHA-256 df1b43a6fd1f1a8e…

MALICIOUS

PDF

68.9 KB Created: 2021-02-19 19:46:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d06a467f7d36b3bf1022c90176a0451f SHA-1: 03600b0e10271d62a608dd3c745ab7a0a295b176 SHA-256: df1b43a6fd1f1a8e9ac70292cde3b8ef2b436daaa8a5012b5f1e38fa8c5a3f19
136 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. The presence of external URIs and numerous embedded URLs suggests an attempt to redirect the user to malicious content or phishing sites. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to deliver a payload or redirect to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://druttle.ru/wix?keyword=1943+steel+wheat+penny+wartime+emergency+issue
    • http://barivelovone.22web.org/vexagenab.pdf
    • https://cdn-cms.f-static.net/uploads/4375531/normal_60245d0bda889.pdf
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/luwov.pdf
    • https://cdn-cms.f-static.net/uploads/4473415/normal_602461f974ad4.pdf
    • https://static.s123-cdn-static.com/uploads/4383924/normal_5ffd54a0634bd.pdf
    • https://mojibivod.weebly.com/uploads/1/3/4/4/134490358/abcf4ed.pdf
    • https://tizusetupo.weebly.com/uploads/1/3/1/6/131607013/zixilefuti_zoralokekefam_lirolaberaxefo_totepira.pdf
    • https://cdn-cms.f-static.net/uploads/4493550/normal_601d4da486d0e.pdf
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/zemipekebonutez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://beturatigamoli.epizy.com/ejemplos_de_minuta_de_constitucion_de_una_empresa_srl.pdf
    • http://najudugofuk.rf.gd/uc_browser_free_android_apps.pdf
    • http://lejubegow.epizy.com/avast_antivirus_pc_apk.pdf
    • https://s3.amazonaws.com/zuvovoxigumuz/railway_station_information_in_gujarati.pdf
    • https://s3.amazonaws.com/wufujudisu/woxolegu.pdf
    • http://gitogopafo.epizy.com/cdc_vaccine_safety_sheet.pdf
    • https://s3.amazonaws.com/fupanabivote/graphics_test_android.pdf
    • http://miwofalixi.rf.gd/14549502741.pdf
    • http://sasoregasot.epizy.com/aocs_official_method_ja_4-_46.pdf
    • https://s3.amazonaws.com/donake/bhojpuri_gana_video_song_premika.pdf
    • https://s3.amazonaws.com/povelenavuviw/bhoot_fm_2018_18_may.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_off0000cee8.bin
f2cd2f02011e6dad5e917d0b1ece3442d9a8f20bef9fe3c4c93f28229e21b429		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE8 5908 bytes
font_01_sfnt_off0000e2fc.bin
b029e721e8dacdd9ba8cd5dfe67eee834493744b5356d6140a9df01247ec36bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FC 10200 bytes

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