Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0894d7407e692c1…

MALICIOUS

PDF

75.8 KB Created: 2021-01-16 23:47:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 26542f4ec7b5ffc7365bf802b9f0bede SHA-1: 28818e7f7006b31e8fb945024177f0628a41ba8f SHA-256: e0894d7407e692c153d68cdeedacee7bcc5f3ea1277dcb0646cbe875a4d7b8fe
184 Risk Score

Malware Insights

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

This PDF document was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains numerous embedded URLs, including one pointing to a known malicious redirector, suggesting an attempt to phish or distribute further malware. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct user-facing text was clearly extracted to indicate a specific lure beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/123?utm_term=motivation+and+learning+strategies+for+college+success In PDF document text
    • https://site-1176551.mozfiles.com/files/1176551/ocean_survival_ultimate_simulator_all_bosses.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385636/normal_5fcedde230c93.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/6ae118d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413236/normal_5fbeb3c1b49e7.pdfIn PDF document text
    • https://sewuvemap.weebly.com/uploads/1/3/4/3/134377394/tafigisafebew.pdfIn PDF document text
    • https://site-1166725.mozfiles.com/files/1166725/74595344616.pdfIn PDF document text
    • https://xeropupofusopa.weebly.com/uploads/1/3/0/7/130776394/4238421.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/giaQjg1/romantic_love_flute_music_ringtone_free_download.pdfIn PDF document text
    • https://site-1176918.mozfiles.com/files/1176918/admiralty_chart_catalogue_np131.pdfIn PDF document text
    • https://site-1174856.mozfiles.com/files/1174856/final_fantasy_iii_nes_rom_english.pdfIn PDF document text
    • https://site-1248223.mozfiles.com/files/1248223/9740642849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480590/normal_5fc0da5fd9df8.pdfIn PDF document text
    • https://site-1168374.mozfiles.com/files/1168374/cozmo_app_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410702/normal_5fdf0ebddf32f.pdfIn PDF document text
    • https://fibimijisu.weebly.com/uploads/1/3/4/4/134461798/dopavogumif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ead6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD6 5252 bytes
SHA-256: bd409e2d6cad42b924e7b302d3b91b0f13c2d3ab067cb06287dc6c758dd693a2
font_01_sfnt_off0000fcdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDD 10768 bytes
SHA-256: 701e33b44d7a74d13cf5aed0b55cb7b7457e6b21fbd1be87caae433f6f61b62c

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