Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ccc21d7b17a65a…

MALICIOUS

PDF

72.0 KB Created: 2021-06-07 11:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 76fa5b1652133f132a16c78d6d7b9909 SHA-1: 723a1622eeb40edfd5b81845815c4e54f6a83a51 SHA-256: 00ccc21d7b17a65af585e545bd0e87fdfb5a42fed1d41445e49dd364c42efb6a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://catamma.ru/pbw?utm_term=0+1st+2nd+3rd+conditional+exercises+pdf PDF link annotation
    • https://wudatoguji.weebly.com/uploads/1/3/4/8/134885495/burodewenugatoviz.pdfIn PDF document text
    • https://fowedejuman.weebly.com/uploads/1/3/4/5/134518602/wolumaxopekafire.pdfIn PDF document text
    • https://dafebifu.weebly.com/uploads/1/3/4/3/134399244/vejesibomu.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/be4502b0-dfde-4dfb-9776-12f15c7944af/soda_stream_gas_exchange_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c71e40-a15f-4a26-94b7-e3b034b61d70/what_are_the_8_stages_of_psychosocial_development_according_to_erikson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5873d9ba-cc5e-456c-ad42-571d1d7d7b71/hp_envy_5530_is_in_an_error_state.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f225f93f-1449-4213-8989-009f038411e6/lepogaduzibotix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d45916d-3448-4a35-a1ff-d528194b68e5/periodic_table_worksheet_answers_1-60.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c23bb2b-4379-4e01-a208-c67784de0573/the_tiger_kid_poem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40052b69-a4cb-4f8e-b910-8ad4c70ae6de/google_play_store_app_download_and_install_free_for_android.pdfIn PDF document text
    • http://pifiloxema.pbworks.com/w/file/fetch/144704868/whatsapp_dikhaye_load_karna_hai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd0e4a6-f665-4ad7-ac01-8dae7022c2bc/what_is_the_best_air_fuel_ratio_for_power.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/934c93f7-4cd1-4808-bd8c-1af3c456a578/xizufexirazunejo.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144415476/bounce_tales_download_uptodown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f53bb3cb-f4a8-407a-a718-2ed9d0de1f3e/how_deep_can_you_dive_with_open_water.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/144411426/buwurezomenidelolafulawis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8528222-74ad-4cc4-92b2-e956c9942e1a/vuwebu.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_off0000d8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E8 5612 bytes
SHA-256: 64cf4d2de7ac5d5f75fa008fc5f3402bdee9d2db56354826ae62d2cad0043a31
font_01_sfnt_off0000ec19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC19 11660 bytes
SHA-256: ba46d1848a0b92973677701b9709074b5e0563b8081c4e70c3e6b73559ef7e4a

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