Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c14dfba9cb3e60…

MALICIOUS

PDF

66.1 KB Created: 2021-02-17 20:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 737355d976bdacf7484e23a94f8e8667 SHA-1: 1aeb6da2f734f817190c17ae8f12160b9dd5805c SHA-256: e8c14dfba9cb3e60e83028fa60001ed1866d7bc173e42741902eaa3112817845
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=army+of+ages+3+unblocked PDF link annotation
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/7412064.pdfIn PDF document text
    • http://mosaniz.22web.org/84981871600.pdfIn PDF document text
    • https://monemoret.weebly.com/uploads/1/3/4/6/134667898/8f755.pdfIn PDF document text
    • http://korsabarca.com/dofixisarimujadefatuluv37p9z.pdfIn PDF document text
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/825065.pdfIn PDF document text
    • http://nutapobo.iblogger.org/gixabufenikefitudilomu.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvuzebilet/ia7LJij/extraction_movie_flix_pro.pdfIn PDF document text
    • https://sujujiga.weebly.com/uploads/1/3/1/3/131379538/689299.pdfIn PDF document text
    • https://vunukufe.weebly.com/uploads/1/3/4/6/134640969/2374973.pdfIn PDF document text
    • http://tur8osale.site/gixupenf8ma8.pdfIn PDF document text
    • http://opticsystem.website/star_wars_vintage_collection_stormtrooper_rogue_oneogexl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/weber_idf_carb_tuning_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/abba_dani_soku_song_free.pdfIn PDF document text
    • http://turufefi.rf.gd/attagasam_movie_tamil_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/standard_thread_size_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/informix_4gl_jobs_in_usa.pdfIn 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_off0000c420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC420 5800 bytes
SHA-256: 5f1a2d25fbc5e7405e5e7796ba2ecbf7907574ce109598906b6337cd86270737
font_01_sfnt_off0000d7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DC 11036 bytes
SHA-256: 9d934d5d135699f70b9cf92b1ed2f498e222ff6e42296f120c94ccfba73280a2

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