Malicious PDF — malware analysis report

Static analysis result for SHA-256 183836d88b076940…

MALICIOUS

PDF

71.5 KB Created: 2021-03-12 07:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca99f4153c568ff3a9a7abb9ae3441bd SHA-1: a4049ddc700bd05aa18a0badf0eb2a6f7485dfdd SHA-256: 183836d88b0769402a8002bfb90084fee3d9148776c1eeab8cb1334c46a7d3fb
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text suggesting it is a lure for "secret piano music sheet" which redirects to the suspicious URL https://mezovuduw.ru/123. This URL is likely used to deliver a secondary payload or phish for credentials.

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://mezovuduw.ru/123?utm_term=secret+piano+music+sheet
    • http://xiruzox.mygamesonline.org/wowubituwavetevetot.pdf
    • https://cdn-cms.f-static.net/uploads/4404490/normal_6040e0b75b03c.pdf
    • http://towufato.mywebcommunity.org/sunbeam_electric_blanket_blinking_f2.pdf
    • https://static.s123-cdn-static.com/uploads/4451945/normal_5fff467ea7418.pdf
    • http://tonedomopoja.scienceontheweb.net/how_to_crack_minecraft_2020.pdf
    • https://static.s123-cdn-static.com/uploads/4451566/normal_6008186b2d1a9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_58f7de7a5b6f4a25bf3a3121842830a2.pdf?index=true
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_8c954eb3c98b43168a16bd1a28e8658b.pdf?index=true
    • http://mixeduteni.epizy.com/calculator_ribbon_for_sharp_el_1197p.pdf
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_61bfcf5be22a40fbb679804193eb6374.pdf?index=true
    • http://nukuzuxowilaz.epizy.com/ocean_basket_menu_2019.pdf
    • https://s3.amazonaws.com/lokijuronig/aap_pneumonia_guidelines_2017.pdf
    • http://zaputizovirifo.rf.gd/the_black_awakening_free_download.pdf
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_39e676d046654a27a056222960e013b1.pdf?index=true
    • http://dagasadat.epizy.com/sopigunavozaxex.pdf
    • https://s3.amazonaws.com/bifadiwuwileji/80841138017.pdf
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_42bbcd6a00b14f2187b3377769706658.pdf?index=true
    • http://roruvavaderej.epizy.com/alaska_kodiak_coal_stove_for_sale.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_off0000db45.bin
3c77dacdf595a4c3a4d9c6365bc3017fef0d81beedf142a928089fc978077564		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB45 5244 bytes
font_01_sfnt_off0000ecee.bin
a39063480629e70730012adeae502fde6afa458b9a65d7e82b6f1d1c59deef3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECEE 10536 bytes

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