Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e0ede0ab2a677a…

MALICIOUS

PDF

73.1 KB Created: 2021-03-18 11:31:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60abc6933687e9f73cc4203d38aa983d SHA-1: 2196356ff0bc61ad359b4a6af02174a4a821683d SHA-256: 99e0ede0ab2a677a0e63572389435408db2f30c83ff853fc0310edda42b899ea
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'nipisod.ru', which is likely a phishing or malware distribution site. While no scripts were explicitly extracted, the presence of embedded URIs in a malicious PDF commonly indicates an attempt to redirect the user to a malicious website, often as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=the+chocolate+war+sparknotes+characters
    • https://cdn.sqhk.co/definuseju/85hgjqB/pocket_rockets_poker_app.pdf
    • https://cdn.sqhk.co/buwuvibija/jcIqCjR/99795898653.pdf
    • https://cdn.sqhk.co/tusadopovet/Pghigje/project_management_books.pdf
    • http://natbeach.space/wadapadepizijekoziq7d34.pdf
    • https://cdn.sqhk.co/poxudanefisi/hhricbu/dude_perfect_videos_2020.pdf
    • https://cdn.sqhk.co/narobalof/djauje0/adventure_capitalist_hack_apk_2019.pdf
    • https://cdn.sqhk.co/lixipadiwel/Shbjhhf/sotamoduf.pdf
    • https://cdn.sqhk.co/bapisolel/MhhlVGI/tujufeguxaleja.pdf
    • http://nerroba.info/john_rawls_justice_as_fairness_a_restatement_summaryhossg.pdf
    • http://youralteragoods.com/3523846713jxiuw.pdf
    • http://navalny.design/show_asterisk_password_androidtwm91.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8ed7ad90-0d0e-491f-9c15-1f6cd5a61d18.filesusr.com/ugd/f1a804_bc50a88b46ba48778ad49c84592980dc.pdf?index=true
    • https://s3.amazonaws.com/poguvelefa/ninujebimapudabenusotebed.pdf
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_b8946fc6344f4832baba610cdc3590bd.pdf?index=true
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_1ee869760d5e44d8b03c5db37827010d.pdf?index=true
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_74564c09005f4bb78f3d33c0b1de637f.pdf?index=true
    • https://s3.amazonaws.com/wenobagupexekap/verify_all_information_is_correct.pdf
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_fb8c6fada7f34d44848b23f6d5f1534b.pdf?index=true
    • https://488a161d-122f-4e25-b35e-34d1d0e27b34.filesusr.com/ugd/bbc910_b18772a10c624fb699250cd90a2c96c0.pdf?index=true
    • 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_off0000e2f4.bin
c750bbd22642db265d2d402a2daa40c68b07be09f686caf77eb87bd6b23eacb8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F4 5124 bytes
font_01_sfnt_off0000f470.bin
f0bc68901bdfdb1504128322c071c66211e5369d8d99f2d53a52c46ce5125193
pdf-font-stream PDF embedded font (sfnt) at offset 0xF470 10148 bytes