Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ac2cdb17c35c41…

MALICIOUS

PDF

78.9 KB Created: 2021-02-16 05:34:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5028bfeb0a240b1ad1ebd0662deda2d8 SHA-1: aaf564dbcc585a52b2580fd12504cca776ce9881 SHA-256: c7ac2cdb17c35c411cc17d7e928ec334c9d0749899b5d6128981b3abfbb8366e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'baarspo.ru', which is likely used for phishing or to download a secondary payload. The document body, though partially corrupted, suggests a lure related to furnace repair to entice users to click the malicious link.

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://baarspo.ru/strik?utm_term=how+to+tell+if+your+furnace+inducer+motor+is+bad PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470532/normal_5fc7d34566af5.pdfIn PDF document text
    • https://cdn.sqhk.co/belerudoxej/ligBgf6/grand_prix_story_2_mod_apk_terbaru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447097/normal_60041d093b6d8.pdfIn PDF document text
    • http://sweetygirl.club/luck_prize_machine_fidget_spinner_for_sale889th.pdfIn PDF document text
    • https://cdn.sqhk.co/rapalaxob/Jiagjhg/narefetafipikikoxu.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/W6RYQgj/gimepagutidepubotus.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxafopagad/xyihgcw/bukitameserufiwa.pdfIn PDF document text
    • http://alcexpress3.xyz/google_drive_ant_manb1l34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412774/normal_5fcd18cff19d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_5fe83c3532993.pdfIn PDF document text
    • http://wonnaturila.space/39822252216xj8o2.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/9jyNCPG/super_smash_bros_ultimate_king_k_rool_guide.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/janodojivi/popanozipefegoz.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/force_and_motion_worksheets_8th_grade_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/cinco_de_cero_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/95364730556.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/han_dynasty_timeline_worksheet.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_off0000f5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DD 5460 bytes
SHA-256: d3ae96907f44a9238a0f1cbb88d71f4f13d982e3cd45cdaa0a3cc3fbbb71c00f
font_01_sfnt_off0001086e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086E 11136 bytes
SHA-256: fd59e0063a30f59ea2639ce4b5493e0d96025df2770d1b07ee30d776c55c3d77

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