Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1525dbc41c4d86…

MALICIOUS

PDF

75.8 KB Created: 2021-03-19 03:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11731d123bbe5a7ddbe4edfb1c10b229 SHA-1: bc28913cf64cde7a58a9cf476acd4015246c714c SHA-256: 1b1525dbc41c4d863e80e0592b9f1d711a1f86a55d6cc0126b36c46cc30d7b4b
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and ClamAV detection confirms its malicious nature. The ML classifier also flagged it with high confidence. While no scripts were explicitly extracted, the presence of external URIs suggests the document is designed to redirect the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/wix?keyword=texas+rangers+lexus+club+box+view
    • http://myirn.icu/nuguputo89fx0.pdf
    • https://cdn-cms.f-static.net/uploads/4465949/normal_6036ae423ecf1.pdf
    • http://xadazobisisim.scienceontheweb.net/astronomy_magazine_february_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4375197/normal_601a876edc5a3.pdf
    • http://usesalle.xyz/pidifosugedudogapawugufrtlz2.pdf
    • https://static.s123-cdn-static.com/uploads/4421770/normal_6008a5a30da58.pdf
    • http://mosuxuvemuzuwex.mywebcommunity.org/misaxatanizaxenunabi.pdf
    • http://bulakirip.getenjoyment.net/adolescent_cognitive_development.pdf
    • https://static.s123-cdn-static.com/uploads/4402503/normal_5ff16817de467.pdf
    • https://cdn-cms.f-static.net/uploads/4480904/normal_6031dbd2e3141.pdf
    • https://static.s123-cdn-static.com/uploads/4369506/normal_6008f32ccfed2.pdf
    • http://mastera-saydinga.ru/luganutolukaznjhy2.pdf
    • http://eslife.pro/how_to_analyse_interviews_qualitative_data4i6yi.pdf
    • http://jonedukemexet.22web.org/katebu.pdf
    • http://larixulefil.iblogger.org/sat_physics_subject_test_practice_questions.pdf
    • https://static.s123-cdn-static.com/uploads/4489429/normal_5ff073071a63f.pdf
    • http://naturebiolog.space/16771568798ioy8k.pdf
    • http://fruitik.space/44929675914dqlay.pdf
    • http://jakor.pro/save_the_cat_genres5yf01.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lawaxisagiwog.atwebpages.com/30951027213.pdf
    • http://nulipadowu.epizy.com/xokinarixifero.pdf
    • http://xajumin.epizy.com/ptt_global_chemical_annual_report_2018.pdf
    • http://tipunogat.rf.gd/all_of_me_piano_sheet_easy.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_off0000ecac.bin
8aecaadcc1e6e45abf3bbeb09b77cad1d258389a366a10b73efa0e110ac3c14b
pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 5276 bytes
font_01_sfnt_off0000fec3.bin
6ff5664c4c8303aa143cc6c33af007863370c76503c74a3ea9b3e843baff3e56
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC3 10172 bytes