Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5333878156e618e…

MALICIOUS

PDF

80.1 KB Created: 2021-04-05 11:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0018ccb79dd8706fb67d18687b944ce7 SHA-1: 47b847532f86042142d0499055b095a3380c17d6 SHA-256: f5333878156e618e22ada2f9ea79e4eab747b0861522d556f33f5329fd0f2907
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains a heuristic indicating a 'Clipboard command execution lure', instructing the user to copy and paste content into a shell, which is a common technique for executing secondary payloads. Several unknown URLs were extracted, suggesting potential download locations for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.sqhk.co/gitopedevid/gcXhegg/angie_adventure_badlands_dragon_ball.pdf In PDF document text
    • http://julivojurukumu.sportsontheweb.net/robiziturejemakivilu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446026/normal_5ffd52b286aac.pdfIn PDF document text
    • http://meetsoda.club/common_core_worksheets_multi_step_word_problems4nsak.pdfIn PDF document text
    • http://goodsfor.life/how_to_get_into_psychology_in_sims_4zjl13.pdfIn PDF document text
    • http://nesobaka3.xyz/5th_grade_math_worksheets_with_answers3ixo8.pdfIn PDF document text
    • http://vujenixuwo.mypressonline.com/11333693261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448345/normal_6041ae6b9dca8.pdfIn PDF document text
    • http://easylearning.space/when_does_dork_diaries_14_come_outxivn2.pdfIn PDF document text
    • http://bawimip.sportsontheweb.net/gate_2020_mechanical_question_paper_with_solution_download.pdfIn PDF document text
    • http://bluebadgeapproval.com/dell_mouse_116lz7oj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_603d146840740.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/mapativanekubosevagadi.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/jVyHjb9/gel_de_jengibre_y_bamitol_para_que_sirve.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/nRgfliL/star_wars_squadrons_ps4_flight_stick.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_60464434d2b04.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/Xr6F2PkPTcg/wb?keyword=is%20calcium%20bromide%20acidic%20basic%20or%20neutralPDF link annotation
    • https://s3.amazonaws.com/wovitiku/2018_barkley_marathon_race_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f212e7b9-4587-425a-bdce-c38202274e7d/pativiturake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84119783-a7c5-470c-a078-c32d2514350a/how_to_shrink_a_video_file_size_on_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ece28a9-404a-4b2a-9955-b8c484932d82/xigigivudaw.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/85249307255.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 5044 bytes
SHA-256: 2618264351a5527c5a69b9456fc5266c5834de979cf12da7dda6f828c3e3991a
font_01_sfnt_off00010174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10174 10320 bytes
SHA-256: 8b929d0a059c7066f1b9f6f786f89e43b8697d503540250c30fb4f018b3f55fc
font_02_sfnt_off000124ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3