Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a659720475ea4e…

MALICIOUS

PDF

83.6 KB Created: 2021-04-05 19:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2c9756fd4c5f0ab602176de7078f397 SHA-1: 2fa1b7add56596bb7bbbf2df5fd0edd54572814f SHA-256: 75a659720475ea4e79d8b959e69b78cc9251793acd2697ecdc85a68720cabfc2
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to contain keywords related to computer hardware, suggesting a lure to entice users to click the malicious link.

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://zajinet.ru/strik?utm_term=asus+p8z68-v+pro%252Fgen3+bios+mod
    • https://cdn.sqhk.co/disumuneriva/gcjf6ih/88872092493.pdf
    • https://cdn.sqhk.co/gapalagabig/ibjjgQ8/osrs_mini_games_for_low_levels.pdf
    • https://cdn.sqhk.co/desavusomo/7wVhiha/77144180956.pdf
    • https://cdn.sqhk.co/mamevugixej/Ojbifjd/pewdiepie_s_tuber_simulator_cheats.pdf
    • https://cdn.sqhk.co/besiwowegin/jflgejb/99820942769.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://a49a6154-edc8-4132-95a2-c7bb8d673fe9.filesusr.com/ugd/551169_f7eb3c673f924be1a928787e5e9deb3c.pdf?index=true
    • http://mujunuge.rf.gd/ncert_class_12_chemistry_chapter_2_notes.pdf
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_4848051b74a84dafb98d5bdad9878782.pdf?index=true
    • http://kutiliv.epizy.com/what_is_td_thinkorswim.pdf
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_01ca37b0f9b94ff99bd3edf5e76780d0.pdf?index=true
    • http://modanatev.rf.gd/nevidolukut.pdf
    • https://s3.amazonaws.com/zuses/videohive_openers_free.pdf
    • https://s3.amazonaws.com/jofunozuzof/confidential_disclosure_agreement_template_free.pdf
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_b9b6967125d842f690f0b78a26397894.pdf?index=true
    • http://weralawubuzeg.epizy.com/passive_verbs_exercises.pdf
    • http://lezebotetojezaz.epizy.com/dokumen_amdal_perumahan.pdf
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_4d7e48a59a9348c3b7aa9ef543e3e0e6.pdf?index=true
    • http://dutagewenurodub.epizy.com/35582334255.pdf
    • https://s3.amazonaws.com/bejexe/super_mario_sunshine_nintendo_switch_controls.pdf
    • http://zogakule.rf.gd/sony_str_dh750_audio_settings.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f183.bin
1e167411bf6f950ea8c1ddd730f247ce4c5d250352839d2de62f6a3bcb1b78d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF183 5660 bytes
font_01_sfnt_off000104b5.bin
c896f507ee95ab9d8c810c8d8079b0cd1a7d57467aef08d29a8efa4162eacce4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104B5 14500 bytes
font_02_sfnt_off00013336.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13336 4324 bytes

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