Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbedf43292a517f…

MALICIOUS

PDF

76.1 KB Created: 2021-01-21 13:51:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 273baf6e4a9d4bd7595363304a4d4936 SHA-1: 5023abba9466e91c5d93f7e928dee999273573ab SHA-256: fdbedf43292a517f987f6127a3fcfbf7120431cd4fde0c2daab2856499ae3e2c
104 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 truncated and obfuscated, contains a reference to 'Budweiser commercial song' and 'wkhtmltopdf', suggesting a lure to disguise a malicious link. The presence of an external URI and the phishing detection strongly indicate a phishing attack.

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=budweiser+commercial+song PDF link annotation
    • https://site-1177113.mozfiles.com/files/1177113/5567867741.pdfIn PDF document text
    • https://site-1083588.mozfiles.com/files/1083588/10416416899.pdfIn PDF document text
    • http://gadezobokonej.iblogger.org/html_css_responsive_template_free.pdfIn PDF document text
    • https://site-1174993.mozfiles.com/files/1174993/21469633594.pdfIn PDF document text
    • https://site-1177846.mozfiles.com/files/1177846/36179816911.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/4ggijMa/ponajegagefojobuxak.pdfIn PDF document text
    • https://site-1178256.mozfiles.com/files/1178256/don_t_spin_fidget_spinners_at_3am.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://getozareburi.rf.gd/kakotetozarixipu.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/8_month_pregnancy_ultrasound_report.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/esl_beginner_test.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/game_guardian_free_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/74037676163.pdfIn PDF document text
    • http://xefivaz.epizy.com/mopoxutezujama.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/damuzadokefexado.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/14529114755.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/86256388980.pdfIn PDF document text
    • http://milisepidug.rf.gd/video_star_for_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/80946732643.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/pakelufuwarorovasugopij.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_off0000dfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAA 5200 bytes
SHA-256: a37207646584644fe6a0a015f380eecd8bfbae029fe8e4bd6d98b0557513cf3a
font_01_sfnt_off0000f13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13C 10552 bytes
SHA-256: b1d16be22955bab900f5f0d018c7db4b344f0e33663cab1afe76718d44b40bbf
font_02_sfnt_off0001155b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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