Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf76d6649b0894ea…

MALICIOUS

PDF

82.4 KB Created: 2021-04-24 10:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e6a560776103b9a22e819ab155a3402 SHA-1: 135688e4c23e637cc4e093150b9ea06b5cf7f8be SHA-256: cf76d6649b0894ea37a13e4af275bd2d8bbf7b4f4c643b8cf86a68e764c0927e
156 Risk Score

Malware Insights

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

The file is a PDF document that exhibits characteristics of a phishing attack, specifically by requesting sensitive recovery information from the user. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL points to a suspicious domain, likely part of the phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://jacksth.ru/strik?utm_term=what+graph+is+used+for+continuous+data
    • https://cdn.sqhk.co/zizenozi/sASihgj/best_hotels_condado_puerto_rico.pdf
    • https://cdn.sqhk.co/modonasuje/vjirdWD/grumpy_cat_weather_app.pdf
    • http://tawabuzawi.iblogger.org/genetic_basis_of_sickle_cell_anemia.pdf
    • http://tiriruno.sportsontheweb.net/kedewaf.pdf
    • https://menafove.weebly.com/uploads/1/3/1/4/131438456/wibul_konotipe_jilotib_zotevokubekek.pdf
    • https://netebina.weebly.com/uploads/1/3/4/5/134596662/wajaw.pdf
    • http://kuxemanes.medianewsonline.com/71292071380.pdf
    • http://nofovukad.iblogger.org/the_brothers_grimm_snow_white.pdf
    • https://madonosole.weebly.com/uploads/1/3/4/5/134582414/sitinaxo.pdf
    • https://lumigoxodavi.weebly.com/uploads/1/3/1/6/131606620/divutak_wagoxadefeziwuw_rupalevatexim_raxebote.pdf
    • http://nifazafagikoxa.medianewsonline.com/semifivaga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pozijawikubinun.myartsonline.com/a_midsummer_nights_dream_plot_summary_act_1.pdf
    • http://niwanabumupe.epizy.com/zufagesal.pdf
    • http://vedezaduxi.epizy.com/garden_answer_wiki.pdf
    • http://tewaremiluzavag.rf.gd/verb_conjugation_worksheet_answers.pdf
    • http://tojuzogip.myartsonline.com/3rd_year_bams_syllabus.pdf
    • http://xinegubuxagod.rf.gd/xodadaxurumobitenazakon.pdf
    • http://farilofisimoru.rf.gd/canoscan_lide_100_installer_free.pdf
    • http://xaxudised.epizy.com/pimixe.pdf
    • http://kogivibavir.epizy.com/98812691063.pdf
    • http://batitesejikak.epizy.com/93783884014.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_off0001032c.bin
1ad6dce6cf2646da50bb161e5d0e4b2149c610ff4286ee492a03832d5ef80f84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 5396 bytes
font_01_sfnt_off00011597.bin
6eadd7d6cc85c8e0002cea2ac57db971395638224cbbaa3d3347df6e2eb3101e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11597 11216 bytes

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