Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec34f186f79fc04e…

MALICIOUS

PDF

75.7 KB Created: 2021-03-23 21:53:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fa936042dd6da7967634bd4935f9062 SHA-1: 813ec98da73d3d00d5455df7edb54ca9087c2def SHA-256: ec34f186f79fc04ec714f1b46d3985ba970de1ae07d1a27624006a598e0697c8
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'soxebez.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to a 'False ceiling design catalogue'. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests it's used to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/award?keyword=false+ceiling+design+catalogue+pdf
    • https://cdn-cms.f-static.net/uploads/4409798/normal_601049f8d6f42.pdf
    • http://xovuwowim.mypressonline.com/nosisokujenurenufi.pdf
    • http://dabosesavedevet.medianewsonline.com/purchasing_and_supply_chain_management_notes.pdf
    • http://netekepipavosis.sportsontheweb.net/kubasebireganewaki.pdf
    • https://cdn-cms.f-static.net/uploads/4403270/normal_6031c13317d5c.pdf
    • http://katermore.ru/algebra_and_trigonometry_sullivan_6th_editionuw36y.pdf
    • http://sfhgfje5df.xyz/11961819187u1nwo.pdf
    • https://cdn-cms.f-static.net/uploads/4366313/normal_602a4982eef26.pdf
    • https://static.s123-cdn-static.com/uploads/4470832/normal_5ffab8a2baade.pdf
    • http://mujoxoluvisukid.getenjoyment.net/char_broil_tru_infrared_grill_reviews.pdf
    • http://voiprormul.xyz/77394814798mn4vd.pdf
    • http://bristol-yalta.run/darussalam_umrah_guidehgtpf.pdf
    • http://cosmosqrab.online/xinadexovirefoseruvazebejfqvlb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jovekus/66655922334.pdf
    • https://s3.amazonaws.com/dazemi/android_tv_box_play_store_pending.pdf
    • https://s3.amazonaws.com/xalasawu/75864194243.pdf
    • https://uploads.strikinglycdn.com/files/64e0b91e-f327-46c8-b5cd-e839c40697cc/how_to_adjust_deck_belt_tension_on_craftsman_riding_mower.pdf
    • https://s3.amazonaws.com/donake/28271329767.pdf
    • https://uploads.strikinglycdn.com/files/60d72cb2-7a23-46df-b0f7-f4c8cf524bca/85092845562.pdf
    • https://uploads.strikinglycdn.com/files/178a5f01-6b20-4ec2-8901-cdc36848297d/48313385559.pdf
    • http://nufulavidibime.myartsonline.com/descargar_manual_prctico_del_operador_de_calderas_industriales.pdf
    • https://uploads.strikinglycdn.com/files/9e2f1ade-8337-4bd8-b962-fa7e12f0f326/starbucks_customer_service_uk_contact_number.pdf
    • https://uploads.strikinglycdn.com/files/4bcea9e1-c288-4947-9aab-ed9e5077663d/quadrafire_mt_vernon_pellet_stove_insert_reviews.pdf
    • https://uploads.strikinglycdn.com/files/c58e0c53-ae00-4c7c-9575-6a521a21fc91/78799257429.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_off0000ed05.bin
c09e1515a5d3fc5119831a6404b1d631ecad345e05a8b106de0be22abe36bbc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED05 5184 bytes
font_01_sfnt_off0000fec0.bin
1d35cc119024116bee6d6d44b637fdffb39574a03b40ff6e342f258b23cfa755		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC0 10344 bytes

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