Malicious PDF — malware analysis report

Static analysis result for SHA-256 284018911eaf33ac…

MALICIOUS

PDF

77.7 KB Created: 2021-03-29 14:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20ee3b37708214150376f7752309aaec SHA-1: a5687b75a1e0d24e8b4c1864afa7ed2e36c55819 SHA-256: 284018911eaf33ac936a8fd1b34ac49da14106f10f3982a4b5457847e31e61c1
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 URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, suggests a lure related to a job description, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/award?keyword=sound+engineer+job+description+pdf
    • https://tumugisoluxadez.weebly.com/uploads/1/3/4/6/134601474/zavonidubitu-juxelunidumav-jiwubuvoliz.pdf
    • http://nunopasatipimav.medianewsonline.com/28359461072.pdf
    • https://bijejumutitin.weebly.com/uploads/1/3/1/4/131454352/1212067.pdf
    • https://cdn-cms.f-static.net/uploads/4386091/normal_60597f4db81e7.pdf
    • http://wusokamojifel.scienceontheweb.net/25777661813.pdf
    • https://sasanufodokedu.weebly.com/uploads/1/3/0/9/130969760/rijimug_jidetutoseturo_donoremibodej.pdf
    • https://vasetovomakoti.weebly.com/uploads/1/3/2/7/132741031/4082705.pdf
    • https://visunudit.weebly.com/uploads/1/3/1/4/131483005/kufap.pdf
    • https://cdn-cms.f-static.net/uploads/4369138/normal_6058ea4c351d8.pdf
    • https://rubuvewoxuvima.weebly.com/uploads/1/3/4/8/134873715/zinuxarap-kapoxid-neboni-tajamufi.pdf
    • http://vevaroda.scienceontheweb.net/samsung_aa59-0066a_remote_codes.pdf
    • https://tobapedez.weebly.com/uploads/1/3/5/3/135344168/xupupubopevatumulu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/toniseligiwuzux/punjabi_status_attitude_boy_2019.pdf
    • https://uploads.strikinglycdn.com/files/2d7bc356-6b40-4ab9-8e07-5f29194fc53d/3839286706.pdf
    • https://s3.amazonaws.com/zinudipir/oster_golden_a5_clipper_replacement_blades.pdf
    • https://uploads.strikinglycdn.com/files/3ad8b35c-fbf6-46e9-ad68-4edd4195749b/google_search_image_resolution.pdf
    • http://fanalejowegop.atwebpages.com/ciencia_definicion.pdf
    • https://uploads.strikinglycdn.com/files/d2e1c43c-4942-4d38-89ee-9fd98d011ece/nothing_else_matters_chords_guitar_easy.pdf
    • https://s3.amazonaws.com/vuxalirudidel/95809289804.pdf
    • https://s3.amazonaws.com/zibenoroduzuw/65067489886.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/8882757037.pdf
    • https://uploads.strikinglycdn.com/files/f1826fff-a752-48c5-a7a7-7a1323312536/final_fantasy_7_characters_wiki.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_off0000f419.bin
89b8aed914ed3747184a1857feff269b23bd3be2af11c69e28180f20db915abf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF419 5400 bytes
font_01_sfnt_off0001068e.bin
1c324b100fc4a331d2936e51d10f78b6179efdd95913d0c460f625230843de43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1068E 10280 bytes

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