Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff65e3c4a6d110a…

MALICIOUS

PDF

77.3 KB Created: 2021-02-22 23:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ef8e5c7e9693f629da3d157e9b35dfd6 SHA-1: c8a1bcee4dfdfa714d09cb5fa52d648e7bb9fe8b SHA-256: bff65e3c4a6d110a4f38e28f00bfb9393a0c3ee48faebbcc47365fcd114db693
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/123?utm_term=line+6+pod+x3+live+manuale+italiano'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=line+6+pod+x3+live+manuale+italiano In PDF document text
    • http://baugroup.info/rock_slope_stability_analysis_giani58lrw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389394/normal_5ffc97ee67d5d.pdfIn PDF document text
    • http://magicwoolshop.com/how_to_prepare_deposition_outlinerdxgu.pdfIn PDF document text
    • http://vipadminler.org/70196852653poc8h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495251/normal_600f7f1706f05.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/jchbhcg/dotabulefefogovuvitej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481819/normal_6003ed2dc76b6.pdfIn PDF document text
    • http://komikewewi.iblogger.org/83020960866.pdfIn PDF document text
    • https://cdn.sqhk.co/pusobatosip/hjejjgd/46080015658.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/jgtUwhj/74667468426.pdfIn PDF document text
    • http://wosidigelime.iblogger.org/lizuzasoxuz.pdfIn PDF document text
    • http://dalnoboyi.xyz/40762664811wijbf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vitafunajubala.rf.gd/hindu_arabic_to_roman_numerals_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/anemia_ferropenica_en_el_adulto.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/dulofowuzukufogasuguroto.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/hair_brushes_photoshop_cs6.pdfIn PDF document text
    • http://bibikefogive.epizy.com/84407941445.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/nopoxere.pdfIn PDF document text
    • http://wobagufiri.rf.gd/insyde_bios_update.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/pipunigixupus.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/29138592077.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE297 5100 bytes
SHA-256: 74778e99e632533eba5bf51e523fe2507e54e517f9f44f600b46da8f61123721
font_01_sfnt_off0000f3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D8 11096 bytes
SHA-256: 2cbd4e74d219319587ac7e38437cc1399858ead52838bfbf80ba7794d92c1e41
font_02_sfnt_off000119a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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