Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b970950ef8de1c…

MALICIOUS

PDF

73.9 KB Created: 2021-03-23 06:16:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85132e98132f0777f4ae898a7c90e0f8 SHA-1: 376f716a9361f6154a89993057d277a6317b8020 SHA-256: 98b970950ef8de1c5509fa3b84d2d1c9021fb81721bc678627eb2a3713b9e644
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://zajinet.ru/aws?utm_term=rodrick+rules+cast', which is a strong indicator of a phishing or malware distribution attempt. The presence of PDF-specific heuristics further supports its malicious nature.

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://zajinet.ru/aws?utm_term=rodrick+rules+cast
    • http://shtancircul.site/pevebizosepofuraridetoxi8uq9c.pdf
    • https://cdn-cms.f-static.net/uploads/4480149/normal_6023bab06f5f3.pdf
    • https://cdn-cms.f-static.net/uploads/4475875/normal_6041210834cc7.pdf
    • https://cdn-cms.f-static.net/uploads/4502439/normal_5fdc035b77dbc.pdf
    • https://cdn-cms.f-static.net/uploads/4490138/normal_6030dce1c3e2c.pdf
    • http://sodaapp.club/emp_generator_circuit_diagramsqzsf.pdf
    • http://blockingscenery.com/how_to_invest_in_stock_market_with_little_money_indiat246z.pdf
    • https://cdn-cms.f-static.net/uploads/4444655/normal_6029e78126707.pdf
    • http://complect-tech.ru/wd_my_cloud_ex2100_setupu8d6l.pdf
    • https://cdn-cms.f-static.net/uploads/4482402/normal_6022837f181f1.pdf
    • https://cdn-cms.f-static.net/uploads/4450907/normal_603eccb42074f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_f7264ee59d97475987a2adc0d6c83515.pdf?index=true
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_6893a17326ae42e3ba5c8482cc6f0263.pdf?index=true
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_ecd6a49f9ea844298a0c58874303126d.pdf?index=true
    • https://506dbbd1-d4b3-44b1-a4c9-6b5d0cab6a23.filesusr.com/ugd/c75f60_1838e66b0a9c467eaef03837317e90ca.pdf?index=true
    • https://443275ec-395d-4f86-84c9-2ed7a250e117.filesusr.com/ugd/7d471d_aed7565114c84ceaa211bee82d2cb660.pdf?index=true
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_a5916792f5e04e758807c44a65db6d28.pdf?index=true
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_126bcf93a5324340b2931bc2f3cde4c6.pdf?index=true
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_7ce253feb8194d6985f6772e789bbf8e.pdf?index=true
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_487cb9ffc5994d209b5411b0d65d8865.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_off0000e510.bin
3ac0919fc778efe2458a1eabf0a6e2da257786c7bcd9e3a1c93f3d8ed296e6f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE510 5004 bytes
font_01_sfnt_off0000f627.bin
b18352a40518b7ea72070ac96497b3ed21b6154a9ec37ea1e8062453362bffdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF627 10780 bytes

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