Malicious PDF — malware analysis report

Static analysis result for SHA-256 8663d3cd577fb276…

MALICIOUS

PDF

83.4 KB Created: 2021-03-17 10:28:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95fd13ce64194ed9aa7e194807fd181f SHA-1: d876bac432985efc8b7595a062ec2e36d59279db SHA-256: 8663d3cd577fb276837b3d133be26c8bcd4d970c924c8bd5251b9168bc4c88d9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://nipisod.ru/wix?keyword=maryland+rule+of+civil+procedure+2-322', which is likely a phishing or malware distribution URL. The document body, though heavily obfuscated, contains references to legal procedures, suggesting a social engineering lure.

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://nipisod.ru/wix?keyword=maryland+rule+of+civil+procedure+2-322
    • https://cdn.sqhk.co/labifikup/4MhcHid/nigaropiroroputoxisusomo.pdf
    • https://cdn.sqhk.co/fomolunuvufa/4hhCXiH/american_aircraft_carriers_of_world_war_2.pdf
    • https://cdn.sqhk.co/wezokobuli/Kih0nij/t_mobile_prepaid_hotspot_login.pdf
    • https://static.s123-cdn-static.com/uploads/4450140/normal_5ffb0819e1fb1.pdf
    • https://cdn-cms.f-static.net/uploads/4425504/normal_602e749a3f7e1.pdf
    • https://cdn.sqhk.co/nizufalagef/jawVIFa/pigedakowabafeborab.pdf
    • https://cdn-cms.f-static.net/uploads/4387229/normal_6048a6135fce6.pdf
    • https://static.s123-cdn-static.com/uploads/4386848/normal_5fd03968d664d.pdf
    • https://cdn.sqhk.co/dokukavifig/hYjgA2x/52639967715.pdf
    • https://cdn.sqhk.co/pepupiribojo/BidBidS/87111882714.pdf
    • https://cdn.sqhk.co/zuxeromewime/XcjaEhe/61794241698.pdf
    • https://cdn-cms.f-static.net/uploads/4428033/normal_60218cc58decf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://revuzulikasulo.epizy.com/mogapigorigokoruz.pdf
    • https://s3.amazonaws.com/salosibejodod/samsung_s5_mini_daten_auf_pc_bertragen.pdf
    • https://s3.amazonaws.com/patilawasu/anki_cloze_deletion_template.pdf
    • https://s3.amazonaws.com/kigavanus/50683978982.pdf
    • https://s3.amazonaws.com/xumakomowi/betepebevagamuxokij.pdf
    • https://s3.amazonaws.com/nisoxow/despacito_telugu_lyrics_song.pdf
    • http://pejinubonuxus.epizy.com/bikovibupozasukibefudawa.pdf
    • https://s3.amazonaws.com/dipafuxe/ugandan_gospel_worship_songs.pdf
    • https://s3.amazonaws.com/niporofez/corporate_attire_for_ladies_template.pdf
    • https://s3.amazonaws.com/puretulenuza/ringtones_app_uptodown.pdf
    • http://fepesori.rf.gd/95542099884.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_off00010990.bin
066c4b637e64e480d8378681ad8aff1f8b7f22f476e090cb933858e4092ee9e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10990 5468 bytes
font_01_sfnt_off00011c62.bin
40e72b262bb49ffd78da24ca447f6b52acb2200fd82c3a08dffe1b281722d932
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C62 10456 bytes