Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf1d08bf6660dab…

MALICIOUS

PDF

86.0 KB Created: 2021-05-07 11:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b9ad2500aff3831d51691f37660479c SHA-1: 56f400007bfa719b05989a3caf9e10d46321b507 SHA-256: caf1d08bf6660dab1ab6908e9a4603d3b86a1963d81621c7b8ee3ae6bf71ee65
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a suspicious URL, and the document body, though obfuscated, suggests a lure related to 'Zig ziglar quotes' and a download button. The presence of embedded URLs and the overall detection pattern indicate it likely serves as a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/strik?utm_term=zig+ziglar+quotes
    • https://folobuwula.weebly.com/uploads/1/3/4/3/134374444/d93a13be0c8037f.pdf
    • https://setibadumizokeg.weebly.com/uploads/1/3/4/8/134880372/d7feae0d.pdf
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/poxiwanodiw-xutesafuxi-komegut.pdf
    • https://wogizirimabote.weebly.com/uploads/1/3/5/3/135337148/1823253.pdf
    • http://tajuliwelofiti.medianewsonline.com/60634921709.pdf
    • http://nexipufogavajid.getenjoyment.net/exercices_orthographe_5me.pdf
    • https://static.s123-cdn-static.com/uploads/4425726/normal_5fdd08e678001.pdf
    • http://fesotisifofil.mygamesonline.org/lovixusib.pdf
    • http://revilokepudidu.mygamesonline.org/15475449952.pdf
    • https://fitadidexedas.weebly.com/uploads/1/3/5/9/135977916/681958.pdf
    • https://cdn-cms.f-static.net/uploads/4406202/normal_604a4a036df31.pdf
    • https://static.s123-cdn-static.com/uploads/4443823/normal_6001321bd71d3.pdf
    • https://static.s123-cdn-static.com/uploads/4380523/normal_5fdfb113e538d.pdf
    • https://static.s123-cdn-static.com/uploads/4389801/normal_5ff1688a343cc.pdf
    • http://itagreen.fun/trumpet_solo_piecesuue8p.pdf
    • http://rowexusaje.mypressonline.com/pilgrim_at_tinker_creek_short_summary.pdf
    • http://a1metromovers.com/divergent_series_book_covers612cl.pdf
    • https://lutapusudifo.weebly.com/uploads/1/3/1/0/131070527/5579119.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sisufovofow.atwebpages.com/17875409931.pdf
    • http://viwuwijagabote.myartsonline.com/84623118469.pdf
    • http://kemesid.onlinewebshop.net/bodyboss_ultimate_body.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_off00011209.bin
94fa134a2d7ee6268e7040b0ea7638639e9a315d474668ac467a9a55e5011ae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11209 4984 bytes
font_01_sfnt_off00012315.bin
7e5efb0390b3bce83fa0d5d8d18230db4a8eaf18f77e6f2d867a550be8902018		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12315 11836 bytes

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