Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d84d27729230b7…

MALICIOUS

PDF

77.4 KB Created: 2021-03-17 10:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b2fcfce0f3c53e85a1f01fb5a8aa3b1 SHA-1: ecd44944c5c431826300aa0cc6fae5ea29954de8 SHA-256: 38d84d27729230b739d87c087c2840963bb92909c3d4a63dc5cf37e5186b2640
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to online PDF editing. The primary IOC is the external URI used to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pelibifir.ru/123?utm_term=edit+pdfs+for+free+online
    • http://bumaputiwowit.22web.org/michael_cembalest.pdf
    • http://003-center.ru/irobot_braava_m6_price27el8.pdf
    • https://cdn.sqhk.co/sokodajep/jjjeUid/trailer_pianista_espanol.pdf
    • https://cdn-cms.f-static.net/uploads/4386084/normal_6038eabcdef08.pdf
    • https://cdn.sqhk.co/jivomawufem/gifqZzw/pinoy_hd_movies_free_streaming.pdf
    • http://2020coupons.info/moviperiludomedevo5pu8d.pdf
    • https://cdn-cms.f-static.net/uploads/4483354/normal_604cd52926abd.pdf
    • https://cdn.sqhk.co/tumosirewuw/FqcUtge/play_shoot_em_up_games_online.pdf
    • https://cdn.sqhk.co/nedabuke/uxiczjj/50403416450.pdf
    • https://cdn.sqhk.co/vanewano/i4ZLSGc/haircut_makeover_tv_show.pdf
    • http://nnorm-id.com/puparisaxicoy.pdf
    • https://cdn-cms.f-static.net/uploads/4401703/normal_5fd91600c4cba.pdf
    • https://static.s123-cdn-static.com/uploads/4454435/normal_5fc87cc5b7f92.pdf
    • http://storezone.info/xilageradufemujeg22zy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kasamirekajitid.epizy.com/89111184396.pdf
    • https://uploads.strikinglycdn.com/files/cac52116-b9db-476c-b7f4-223f4ebbdc63/how_to_throw_out_old_clothes.pdf
    • http://xatamiv.rf.gd/1390892550.pdf
    • https://uploads.strikinglycdn.com/files/b295c19e-1576-424d-96a2-75b6e6438a3f/tu_rio_fluira_letra_musica.com.pdf
    • http://kulilemol.epizy.com/ap_calculus_textbook_download.pdf
    • http://sadefevofog.epizy.com/telaxitabigogawubikilawi.pdf
    • https://uploads.strikinglycdn.com/files/ba394f1c-f776-4a5f-b792-6efcdba2c13a/love_story_lyrics_indila_hindi.pdf
    • https://uploads.strikinglycdn.com/files/9755237c-9f1c-4892-a2bb-3f17d12af53d/calcular_area_do_triangulo_geometria_analitica.pdf
    • https://uploads.strikinglycdn.com/files/e7abd404-5f15-4127-a0c9-9502fc5ce071/what_can_i_do_if_someones_dog_bites_me.pdf
    • https://uploads.strikinglycdn.com/files/cbd64f79-42f0-41a9-aca8-85d82a229447/mikuruvetepipumirojusu.pdf
    • https://uploads.strikinglycdn.com/files/78dcf855-69bb-47ed-b630-6276e8319031/lefumotokoxekux.pdf
    • https://uploads.strikinglycdn.com/files/a89bc820-86f2-48a9-85ef-09b39e531d12/hp_pavilion_zv5000_drivers_windows_xp.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_off0000f3b7.bin
0bff898e5c7e701ae86ac38ce4ae8c8b6e58c14337bd11857891f455df677dac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B7 4784 bytes
font_01_sfnt_off00010410.bin
3a77223e6128503eb32e8a5ca151ed760437f1ec93da2933519d34e62ab40159		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10410 10532 bytes

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