Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c35a4076184b184…

MALICIOUS

PDF

73.1 KB Created: 2020-12-27 22:25:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc3bf5f8c96b2b5738474fe383dbba64 SHA-1: b95aa722cc1789b7f3af835b4a9ca3095c5acafb SHA-256: 3c35a4076184b184189bc1d01e0fadcdbb0c576bedd96c8c88fc004049c4118e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URL that leads to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to reference product details, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=black+and+decker+rotary+tool+router+attachment
    • https://cdn-cms.f-static.net/uploads/4387243/normal_5fab6c0e9702c.pdf
    • https://cdn-cms.f-static.net/uploads/4369922/normal_5fa3445980a8a.pdf
    • https://static.s123-cdn-static.com/uploads/4408983/normal_5fe1bf99102db.pdf
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5fc29db09cc08.pdf
    • https://cdn-cms.f-static.net/uploads/4418188/normal_5fc1c56490790.pdf
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5fa2329521642.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f41b0b5b-f169-4e43-ac03-27b26740eab1/romediwupowamiziti.pdf
    • https://uploads.strikinglycdn.com/files/8ba7315c-ddcb-4be1-bf1e-ceb920187645/vovudokunogewuval.pdf
    • https://uploads.strikinglycdn.com/files/b0f324c4-c230-4df2-9d49-ae35e813f55b/deadpool_2_full_movie_watch_online_free.pdf
    • https://s3.amazonaws.com/wemupajese/gotham_rounded_bold_font.pdf
    • https://s3.amazonaws.com/zinudipir/xumavexitapirimeselataxef.pdf
    • https://uploads.strikinglycdn.com/files/1a35d7d0-e9d2-4db0-a98f-ae8e0a1d245e/blue_horse_spirit_guide.pdf
    • https://s3.amazonaws.com/kakef/22298570320.pdf
    • https://uploads.strikinglycdn.com/files/430acd97-4bcf-4f02-a738-01279418744c/royega_pachtayega_punjabi_song.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e04b.bin
83b2dc46d568c737f64ed2105ee67fb90f870652d5ca5b5c634069243511c084		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE04B 5216 bytes
font_01_sfnt_off0000f1e7.bin
df84493c3b6ac343bf9d5086deb381d3f68fcefcd7e87c4fdf68786e593cd24b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E7 11088 bytes

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