Malicious PDF — malware analysis report

Static analysis result for SHA-256 40edc27eb39d9c97…

MALICIOUS

PDF

76.1 KB Created: 2021-03-28 19:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93cb35b0e6bd75aa0cc50ac039bcc50c SHA-1: 7bad6c12d5023b110e44fb7cd4db0141d8dbc277 SHA-256: 40edc27eb39d9c974f993e58c340d62fb70938773939b20d07e8fde4e0429d2a
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, appears to contain product-related keywords, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=sharp+projection+alarm+clock+walmart
    • https://static.s123-cdn-static.com/uploads/4419206/normal_5fcfeb08622f8.pdf
    • https://cdn-cms.f-static.net/uploads/4409797/normal_6044a07f80274.pdf
    • http://pesuzukotejoki.iblogger.org/gapekukidaf.pdf
    • https://cdn.sqhk.co/xawefigi/XjdIRhg/puppet_soccer_fighters_friv.pdf
    • https://cdn.sqhk.co/vukupamita/ibWjjek/how_to_get_the_chosen_app_on_roku.pdf
    • https://cdn.sqhk.co/tiluzegata/a2gekgc/malunor.pdf
    • https://cdn-cms.f-static.net/uploads/4408004/normal_6018e039b1e82.pdf
    • http://nulonelam.66ghz.com/77299037242.pdf
    • http://lobarularexe.iblogger.org/adobe_after_effects_cs4_templates_free_projects.pdf
    • http://kikotukujumosif.iblogger.org/how_can_you_describe_stars.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4a013da0-8133-42f8-8c6c-bc825bce9d53/tp-link_tl-pa4020pkit_powerline.pdf
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_36122e274f7f4cf19aa1b49625155879.pdf?index=true
    • http://xoluwemulejunow.epizy.com/soxaf.pdf
    • https://uploads.strikinglycdn.com/files/23a40d70-a94c-4c17-b77b-5267ea1d1fd8/cual_es_el_campo_de_accion_de_la_psicologia_clinica.pdf
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_6881a47e743e4449bdca7250d7979cca.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9ae1fdb6-2319-4107-aa64-3ac55f799835/el_conde_de_montecristo_pelicula_gerard_depardieu_reparto.pdf
    • http://kofadokajofej.epizy.com/xotuxixebimeterubok.pdf
    • https://uploads.strikinglycdn.com/files/b2466b1a-8396-4eec-a977-e192e147c1a9/how_is_jaycee_dugard_doing_today.pdf
    • http://pezusor.epizy.com/xujotosura.pdf
    • https://uploads.strikinglycdn.com/files/37d10424-6f37-4101-af73-8b399c0e4909/why_does_my_stove_top_work_but_not_my_oven.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_off0000ec46.bin
2b452277fe3c811dc39447388a3a043966971cfd5e43a433a2bde67c6a68738e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC46 5332 bytes
font_01_sfnt_off0000fe4e.bin
b47dbe2af7c79a3909e00bda17f8887569d598300dcab98c718443993dbcc068		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4E 10792 bytes

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