Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e70177067720768…

MALICIOUS

PDF

75.1 KB Created: 2021-03-20 09:04:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 20eb3631276967912be87d1a73048562 SHA-1: 897866c049fe0090d01b830050904565f4bb110b SHA-256: 9e70177067720768118949db60f3f56670941aef938ebf79d9fa39e311b4af78
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=vishnu+sahasranamam+gujarati+audio+download PDF link annotation
    • http://xonitaj.mywebcommunity.org/juvidowupogamikodarura.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab54fc46-0921-4569-ba70-f926e3dd4937/56210089429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0458980-d591-473b-9680-e9f73e5251e2/jadugululisudetudopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b67e8e2-87e8-4759-b7d9-c91d112f468e/commodore_64_summer_games_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c902f898-b4d4-42cd-b269-ad967de104c2/operations_manager_salary_in_amazon_india.pdfIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_4e213b8c7a63454db67d938ec5e3aef5.pdf?index=trueIn PDF document text
    • https://4e4608fd-868e-43f5-b6ba-14e5e4b50785.filesusr.com/ugd/b1f235_eba66e2806d04bd38da2bf4207d27f0d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/686434c5-86cd-4486-a265-994d2d3b14eb/my_side_of_the_mountain_test_free.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/nenozonireferozedonanewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a925d802-9b39-46ea-8bfd-0b54f0b170f2/basic_easy_guitar_songs_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e6ec40-e28a-48d0-bffc-b194e5fbf947/vizio_e370vl_manual.pdfIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_467797a0c15b4c51a6c5ae9085e7b9f5.pdf?index=trueIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_ae497722aaa74cf594970ba852409787.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/cuales_son_las_mejores_paginas_para_buscar_trabajo_en_argentina.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_2d914714fd2b45659765e7e352cfa77b.pdf?index=trueIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_6c2d0734ba92410bbc94315c52726f58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/91582088233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9bc6c79-10cf-4c45-85ea-21ffc8cd9fb0/power_pressure_cooker_xl_rice.pdfIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_7ba95e5caec341bdac06d5dbcf6d972d.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_off0000e7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A4 5372 bytes
SHA-256: 70fb0a015214434e42812018b4a38ca930f44356da33010ca1352409fae40bde
font_01_sfnt_off0000f9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D7 10968 bytes
SHA-256: 284bf8d47413a8e2138a9bc972769ccbf1154fa722a3617a6520b5f5a52c6f25