Malicious PDF — malware analysis report

Static analysis result for SHA-256 3459f0492997e7c5…

MALICIOUS

PDF

77.7 KB Created: 2021-02-24 05:22:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2af80c0e71c17eec4fdbce2159429516 SHA-1: ecfbcee552f0db1da75a3c6877c50eaf3b234799 SHA-256: 3459f0492997e7c50df83ea70ef44e475dc226b56d9bcd7996f6c6478e74778a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/123?utm_term=vivitar+infinite+bluetooth+speaker PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427300/normal_6031fbb080396.pdfIn PDF document text
    • http://cabinetsop.xyz/faxibijobedalamijo06f9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496216/normal_5fccfcb720af3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499299/normal_5fd809c75d1dc.pdfIn PDF document text
    • http://trenketo.buzz/66981339721u9zvf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_60355e686f93e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451021/normal_5fe3bb9382db3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449783/normal_5feb4ba4ecf1c.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/galinikagopit/2018_forester_2.0_xt_review.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/bless_the_broken_road_sheet_music_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/1725838585.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/endeavour_energy_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/competent_cells_transformation_protocol.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/dividends_paid_on_the_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/siviwijo.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/fire_emblem_three_houses_guide_tea.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/asperger_adultos.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/nintendo_ds_lite_battery_life.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_off0000f2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DA 5220 bytes
SHA-256: 0112cf4dfc8bf062e574d21c1f7be426e3659b4be1257e691fa24d2689830d1a
font_01_sfnt_off00010497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10497 10920 bytes
SHA-256: 285bd49ac177ef97ba137f743afe9289f300e54ab515524a91364e931d0178e2

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