Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c389a1441ebbfa…

MALICIOUS

PDF

77.7 KB Created: 2021-03-21 05:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e1d6aeae5dd0f0bdb8a8ed9305245fca SHA-1: 2458178a8a3fa9bed8108796121da7984fc1689e SHA-256: 93c389a1441ebbfa264ce8a6758ead300c4488d4923a1cb89101988cfa3b309b
156 Risk Score

Malware Insights

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

The file is a PDF containing a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links, 'https://dugedepap.ru/strik?utm_term=i+pilot+link+vs+ipilot', is flagged as suspicious. ClamAV also detected the file as 'Pdf.Phishing.Trojan'. The presence of numerous links suggests an attempt to direct users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=i+pilot+link+vs+ipilot PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/marshall_haze_40_footswitch_schematic.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/64853472064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d417993f-84a6-41cc-bd19-8d660b236000/54234948940.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/the_pyramid_principle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a126742-1d4b-45a1-a3e2-6479d78d7b56/38451839623.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/givupij.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/chrome_os_recovery_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3113234f-3870-44d6-a488-2602b079d21d/how_to_hard_boil_eggs_in_a_stovetop_pressure_cooker.pdfIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_4fe2c45eed384f9e9234245fddf8d721.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/gasofazalal.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/wezexojoteripikoforal.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/56678734528.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/soluroserexan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f291eb0f-76fd-409e-8aee-078e5504d8c3/41806886650.pdfIn PDF document text
    • https://a22c3535-4c29-4f26-bf6b-1e631d3648e5.filesusr.com/ugd/28986c_6b6032cb7d494a549baddeb21f3b588b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donarepemi/wuxilomivaruvuwusuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa2397d8-4f18-4be6-b93a-7b4707d3953f/febusowufad.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/android_api_call_tutorial.pdfIn PDF document text
    • https://03a45e23-20c9-4b13-8d21-50c2609e56df.filesusr.com/ugd/502f3d_0fa72951b06a4962bbbd93995cf89f46.pdf?index=trueIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_9ce9c950e77b47218bbb56a26b2ba847.pdf?index=trueIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_efdf1bb8bd8a4a288a72e1704830d3c0.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF239 4568 bytes
SHA-256: 2be183d6a17cf180f100b2a30f615fc8ee4a2e3597b6fb286fc4e906c00837ab
font_01_sfnt_off000101e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E0 11104 bytes
SHA-256: d92e15317b7589d555a08318b3c2b370ed22f032d6ca62802813ded4e791678a

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