Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb662909572b42e6…

MALICIOUS

PDF

89.1 KB Created: 2021-04-04 15:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ae8f2eef82e5e95d7d745eccfd5d2b0 SHA-1: 25f90041dc97224e8597a4e865413ee80eb26b77 SHA-256: cb662909572b42e680bf1b0e259a29b18303add248c6fc4d19ec38ed894df889
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to a game guide, which is a common tactic for phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/wix?keyword=osrs+barb+assault+collector+guide
    • https://cdn.sqhk.co/pozigafo/a4EogcB/home_depot_3_gang_switch_box.pdf
    • http://datovufes.scienceontheweb.net/meaning_of_bounded_rationality.pdf
    • http://lulopoboxefon.scienceontheweb.net/jack_reacher_full_movie_streaming_free.pdf
    • http://raguvigawak.mypressonline.com/manual_of_love_2_full_movie_watch_online_free.pdf
    • http://nafepuzemobir.sportsontheweb.net/806125583.pdf
    • https://gabelutabidos.weebly.com/uploads/1/3/4/6/134678244/fupurukebemi_dotewawalake.pdf
    • https://cdn.sqhk.co/mezewimaxus/ux4igic/tomb_runner_2_poki.pdf
    • https://dapalijika.weebly.com/uploads/1/3/0/7/130738969/9649082.pdf
    • http://napowojeba.medianewsonline.com/84875288420.pdf
    • http://tejowigasinafu.getenjoyment.net/vector_algebra_class_12_formulas.pdf
    • http://xajabuzowa.scienceontheweb.net/probability_distribution_exercises_and_solutions.pdf
    • https://cdn.sqhk.co/wuvakumo/gixUPhd/bloons_td_battles.pdf
    • http://xuxetosufuzo.getenjoyment.net/msoe_nursing_acceptance_rate.pdf
    • http://durebemidiges.getenjoyment.net/greenhouse_effect_worksheet_middle_school.pdf
    • https://xoravali.weebly.com/uploads/1/3/0/7/130775395/c22dba.pdf
    • http://tavafotuzefox.sportsontheweb.net/research_techniques_in_accounting_and_finance.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://safedoguno.onlinewebshop.net/72556570583.pdf
    • http://pozajuw.atwebpages.com/rapport_d_analyse_financire_d_une_entreprise.pdf
    • http://tatesit.myartsonline.com/call_centre_agent_job_description.pdf
    • http://kopurelotalad.onlinewebshop.net/64162701033.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_off00011f24.bin
0c4e0eb6756f140beed20ba1573b1e044376d1775186cfb59cfeaf2db7f2f7b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F24 5276 bytes
font_01_sfnt_off00013114.bin
24a9c693e0f23dda9988d1d853e5c38df1256e7af1c10b8dd07397746dfc1d77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13114 11300 bytes

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