Malicious PDF — malware analysis report

Static analysis result for SHA-256 18dc09f2852e556a…

MALICIOUS

PDF

75.6 KB Created: 2021-05-08 06:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 371db275ee2852e36bbc708dbf5b5d6c SHA-1: 2e704648e3962133e27b96ab0c0cec6a07a99067 SHA-256: 18dc09f2852e556aface062d4b2e4c74d1f337285b368f5853a36460ac0cd02e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain metadata related to search terms, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=2006+honda+odyssey+alternator+amazon
    • https://cdn.sqhk.co/dudavizi/jeIBZle/kidusugiru.pdf
    • https://static.s123-cdn-static.com/uploads/4451757/normal_5ff02a48e173b.pdf
    • https://cdn-cms.f-static.net/uploads/4483103/normal_605dac0026dd5.pdf
    • http://bettyloustintruckbbq.com/how_much_does_enterprise_charge_to_rent_a_car_for_a_week2awor.pdf
    • https://cdn-cms.f-static.net/uploads/4463005/normal_5fd0decd942a7.pdf
    • https://cdn.sqhk.co/vakanaju/UAgHk95/lalonuvatogizudoserebubi.pdf
    • https://cdn.sqhk.co/mekaxosur/7ijyPKL/37550190946.pdf
    • https://cdn.sqhk.co/moxulofilose/hhybidE/30501271933.pdf
    • https://cdn.sqhk.co/bujiwamovul/DRhhJjj/korean_songs_lyrics_with_english_translation_app.pdf
    • https://static.s123-cdn-static.com/uploads/4457586/normal_5fcd9dd6ab72d.pdf
    • http://creditpm.com/35594657008a7e9w.pdf
    • http://constructionhouse.info/the_child_by_tiger_analysisqw9dg.pdf
    • https://cdn.sqhk.co/nanagajog/Ijaxjbi/android_tutorial_google_maps.pdf
    • https://cdn.sqhk.co/savunowudob/jUoMhdz/guess_the_song_emoji_2020.pdf
    • https://cdn.sqhk.co/noxisoture/igjcV2n/aarp_games_word.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/geraromu/aew_revolution_live_results.pdf
    • https://uploads.strikinglycdn.com/files/5063dd98-ec22-480d-82bb-42bbb2778b5e/86298436897.pdf
    • https://s3.amazonaws.com/paxuvagal/26480076411.pdf
    • https://s3.amazonaws.com/fosawef/automobile_parts_images.pdf
    • https://uploads.strikinglycdn.com/files/6b1a2e57-8b78-4566-b59d-441e001c6146/37966173024.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_off0000e9f4.bin
54ee0f652a3b6a37f7e22dd9518b16e7e3ba41bb77652cd11a43a8c8006846a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F4 5548 bytes
font_01_sfnt_off0000fcb2.bin
8cc071bd1cee2fcde660ff3a05f9b309044f3a5aac990d8f5615df561ba9d2ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB2 10688 bytes