Malicious PDF — malware analysis report

Static analysis result for SHA-256 f314251806bd6a36…

MALICIOUS

PDF

73.5 KB Created: 2021-03-03 02:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: fa17c5acca5550a33c3e22b2f51dd80f SHA-1: 5c356fb76d94dc00cbeece3d0c168878f83d5231 SHA-256: f314251806bd6a36eb6b95afe04120fe57f1fa3f36fda47fd2c36f8af29cb08f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs to a suspicious domain, likely intended to host malicious content or phishing pages. The document body, though heavily obfuscated, appears to be a lure related to a product search.

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://leonvi.ru/strik?utm_term=homelite+leaf+blower+starter+rope PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448341/normal_60246250cf524.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388289/normal_5fe0be8eac200.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/hb3fCyd/wugagivurotefoxok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466680/normal_6034f2f871f54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365639/normal_60021d4c372df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495696/normal_5fcb1e42983de.pdfIn PDF document text
    • http://xilagima.66ghz.com/albert_schweitzer_biography.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/dozore/82929300451.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/formative_assessment_and_summative_assessment_difference.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/vogijotanazuj.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/dish_tv_remote_control_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/66822153305.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/android_read_inputstream_to_byte_array.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/86995589229.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/gershwin_i_ve_got_rhythm_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/10044453691.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_off0000e3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BD 5240 bytes
SHA-256: 50443e74b31ce9caef06fd6c26bca435f88591915d66170ebef86852fff9d0ba
font_01_sfnt_off0000f584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF584 10412 bytes
SHA-256: 0364b94a800725948b770375682a2cea7ec62683fb633f32c52772d79c560dbb

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