Malicious PDF — malware analysis report

Static analysis result for SHA-256 de3aca4a07ae7fc4…

MALICIOUS

PDF

75.3 KB Created: 2021-06-11 22:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c87566bb856e7e7ebb8d72cfe4f79d0b SHA-1: cfe01f6989d837b47cfbc9eb2475c5b96366b105 SHA-256: de3aca4a07ae7fc4d89cdbaebcbdd78f77c8cb909745d9a9e26d93f6919ab070
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on potentially untrusted domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly suggest this document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/pbw?utm_term=all+movies+of+percy+jackson
    • https://bobiputab.weebly.com/uploads/1/3/2/8/132814039/zumagubajegogijebe.pdf
    • https://static.s123-cdn-static-d.com/uploads/4427080/normal_60b365a7dd176.pdf
    • https://ninalekenapuboz.weebly.com/uploads/1/3/4/0/134017067/836079.pdf
    • https://static.s123-cdn-static.com/uploads/4390684/normal_5fe18369f121c.pdf
    • https://static.s123-cdn-static.com/uploads/4499309/normal_5fdd617c7370f.pdf
    • https://cdn-cms.f-static.net/uploads/4477877/normal_605efe08678af.pdf
    • https://pidakobanaxob.weebly.com/uploads/1/3/4/4/134463411/lukijebebifuwewidejo.pdf
    • https://cdn-cms.f-static.net/uploads/4452206/normal_6036bb02782f0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://topolopugad.pbworks.com/w/file/fetch/144878706/coulombs_law_worksheet_with_answers.pdf
    • http://gitixofipoxu.pbworks.com/w/file/fetch/145128609/gta_4_mobile_official.pdf
    • http://xoxafepapesu.pbworks.com/w/file/fetch/144411585/zurudilufobalapabowu.pdf
    • http://betosaxugawi.pbworks.com/w/file/fetch/144454446/kotene.pdf
    • http://tugewuvog.pbworks.com/w/file/fetch/144744522/canon_sx510_hs_manual_download.pdf
    • http://ropotupi.pbworks.com/f/how_to_close_diaper_genie_lid.pdf
    • http://mujefapufefi.pbworks.com/f/elite_temporada_5_danna_paola.pdf
    • http://negovijalulu.pbworks.com/f/tu_long_te_main_lachi_mp3_song_download_pagalworld.pdf
    • http://bazibenis.pbworks.com/w/file/fetch/144872625/broforce_unblocked_google_sites.pdf
    • http://lakiluxodev.pbworks.com/f/lights_out_full_movie_watch_online_free.pdf
    • http://pewamez.pbworks.com/w/file/fetch/145019256/20763565597.pdf
    • http://voveras.pbworks.com/f/honor_20_gcam.pdf
    • http://dokajawema.pbworks.com/f/mexixupovojadomivoka.pdf
    • http://wimarolos.pbworks.com/f/gujumasamakofumizago.pdf
    • http://lijegazoz.pbworks.com/f/is_shein_xl_true_to_size.pdf
    • http://wojoxevom.pbworks.com/w/file/fetch/144778938/videos_para_desear_feliz_navidad_a_una_amiga.pdf
    • http://wuwolufit.pbworks.com/f/23291517661.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_off0000e72d.bin
06ba1432a997b1e281e6446b61748710ee646b8a182d9f974ca342d7e1456a64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE72D 5452 bytes
font_01_sfnt_off0000f9bb.bin
eaac9900885c637eea23e2927cfd68749000121e9c77e43527f10e1326a735b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BB 11240 bytes

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