Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f1e0475eae7094…

MALICIOUS

PDF

69.7 KB Created: 2021-05-11 03:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81b065518da55e80473ddabfbccb1b94 SHA-1: b305a9b738b4aed81d8ffd9b686d18612efad31d SHA-256: 76f1e0475eae7094cd6f0338f1e465d91e4cedb42cd3dbac4347b80058ca3388
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 ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a lure related to a 'propel helicopter app', likely intended to trick users into visiting the malicious URL for a fake download or information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=propel+helicopter+app
    • http://reform-st.ru/ketowusonagujituvlglg9.pdf
    • http://xuzerujagojagip.scienceontheweb.net/gta_san_andreas_cheats_free_download.pdf
    • http://wujasonuvilo.mywebcommunity.org/rakisejabofegize.pdf
    • https://cdn.sqhk.co/lunosupi/icE5gga/sinonifewebebitezikatezo.pdf
    • https://cdn.sqhk.co/gabixeme/jdgdgib/darkness_and_flame_2_game_walkthrough.pdf
    • https://cdn.sqhk.co/dodamewope/hgEF8ib/pixel_zombie_frontier_hack_unlimited_cash_gold_download.pdf
    • https://cdn.sqhk.co/dojidavos/dhhVih5/free_download_face_changer_for_pc.pdf
    • http://idslim-italia.site/deep_learning_for_computer_vision_with_python_adrian_rosebrock_downloadzu0s3.pdf
    • http://thedouche.xyz/netgear_4g_lte_modem_manual1937h.pdf
    • http://usacreditscore.info/1734-aent_series_c_edsbqesx.pdf
    • http://starkrobotics.org/monument_valley_apptf0qh.pdf
    • https://cdn.sqhk.co/segenapiza/QISibgd/space_wolf_omnibus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_0da7b3497c4e409e97d5dadf7c120e0f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/997f755b-388b-4e9e-b794-9ba396aeb962/eu2000i_honda_generator_price_canada.pdf
    • https://uploads.strikinglycdn.com/files/9da2de03-fd07-42c7-9c62-e3e81877af1f/dasewam.pdf
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_37c9a201860b4bfeb0629726d4c9f35d.pdf?index=true
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_166986133cd249bfafd323be588012a1.pdf?index=true
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_177f0c55a2ae49db9d33cb1bcec02037.pdf?index=true
    • https://uploads.strikinglycdn.com/files/11a142ce-319f-4432-b36f-eedaf1386b90/73229825418.pdf
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_01a154a4ddb240549219e6b2e90f2864.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5f567e94-65ab-48a0-aa83-0d00c05a3aa8/law_textbooks.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_off0000d47a.bin
76f4ab94058f6e135181179351bea7d6b37499bfecbc5d6d164d39939a924fce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD47A 4844 bytes
font_01_sfnt_off0000e4ed.bin
a5294378877772abeb4313f03a01ab7b884cb0856377dc9c4131ba94c8126144		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4ED 10552 bytes

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