Malicious PDF — malware analysis report

Static analysis result for SHA-256 7090572e801b8289…

MALICIOUS

PDF

67.4 KB Created: 2021-07-09 08:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a58362d0318c2ef95e82885af4a39329 SHA-1: 54522e62b949d605490d43a4c8522f6fa5779976 SHA-256: 7090572e801b82894a5a7560932d6d5b735ab9ed6b19ac68b17c9083b6560ecf
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains embedded URLs, one of which points to a resource that could be used to download a secondary payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external links and the malware detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://cdn-cms.f-static.net/uploads/4368777/normal_60c50df838c9f.pdf
    • https://cdn-cms.f-static.net/uploads/4420224/normal_601b93eb30978.pdf
    • https://static.s123-cdn-static.com/uploads/4410211/normal_5fe1756b46c03.pdf
    • https://static.s123-cdn-static.com/uploads/4374852/normal_5feb08ea88f45.pdf
    • https://cdn-cms.f-static.net/uploads/4498997/normal_602d045a84bfe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/sq/ugae/~3/kVSxLQpkboc/square?utm_term=probability+distribution+examples+and+solutions+pdf
    • https://uploads.strikinglycdn.com/files/28c43791-7ddf-4f85-9605-ca23a249721b/how_to_operate_an_ariston_washing_machine.pdf
    • https://uploads.strikinglycdn.com/files/4965d900-3294-4a7c-aa82-dff195c033d4/wordpress_download_link_plugin.pdf
    • http://pekazaxe.pbworks.com/w/file/fetch/144995424/fujuxaxeneli.pdf
    • http://tujelupirobe.pbworks.com/w/file/fetch/145174881/mibalefuravinokozisizeval.pdf
    • http://nitezug.pbworks.com/f/why_is_there_no_power_to_my_bosch_dishwasher.pdf
    • https://uploads.strikinglycdn.com/files/e3a190a9-30fa-42b3-b8bb-9842aa426c63/odd_thomas_movie_ending.pdf
    • https://uploads.strikinglycdn.com/files/203f6b21-b268-4cc0-ac3b-ddf00a2897e4/woodshop_safety_rules_test.pdf
    • http://defuveb.pbworks.com/f/shadow_netflix_age_rating.pdf
    • https://uploads.strikinglycdn.com/files/d56758a7-e9d7-4af7-ab85-5ce4374c9778/2000_chevy_blazer_service_4_wheel_drive.pdf
    • https://uploads.strikinglycdn.com/files/413ebefa-a359-489d-b4ec-9c98d4768cce/lonutub.pdf
    • https://uploads.strikinglycdn.com/files/e3920382-8cb5-4bcb-a82b-78a5e7f68d2a/falcon_4.0_demo_download_free.pdf
    • https://uploads.strikinglycdn.com/files/2ef1f287-3782-449c-9eef-6e50442da98c/penny_dell_crossword_puzzles_la_times.pdf
    • http://sagetoladije.pbworks.com/w/file/fetch/145245669/22181655656.pdf
    • https://uploads.strikinglycdn.com/files/fb6aa739-f791-4efc-a7b6-a1d63bcd3c8c/how_to_use_cooks_essentials_stovetop_pressure_cooker.pdf
    • https://uploads.strikinglycdn.com/files/1b350374-f364-43e6-89bc-c3317ac0e88a/push_by_sapphire_book_summary.pdf
    • http://fixulirulafa.pbworks.com/w/file/fetch/145230621/download_roblox_mod_unlimited_robux.pdf
    • https://uploads.strikinglycdn.com/files/7ef491a9-e437-4f4a-a358-705ea88a05b6/66380637913.pdf
    • https://uploads.strikinglycdn.com/files/37d6c628-6f0a-41ae-b61b-087d69fd0ec1/76528283186.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_off0000cc48.bin
5431ba390a77b3339cbe36159ed2d529beb1f2294ef32d59a8fed02cc537cf5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC48 5496 bytes
font_01_sfnt_off0000dee9.bin
bc35277c972145f19ec7c168eb6098fbe73fcaa72f3f983ea22f3987db9793c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE9 9604 bytes

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