Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc4b18b87c4015e…

MALICIOUS

PDF

41.0 KB Created: 2020-11-01 23:20:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 181e1ca353c8d5a34a9edc4a1c67635d SHA-1: d0a804ee5dd5f5e99e062e16313acfa8a720554f SHA-256: 1bc4b18b87c4015ee3c132f1dc5f0c9a6ebaf47c52f67bbcea3ad4fde4d53eb6
94 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 an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?keyword=role+of+operations+section+chief In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/45152659356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c9fe8d-08fc-4ae6-83a8-694193a2ecad/wowiligixebafedubezo.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/vedutibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f9eca8-4a4f-42f9-99a3-c8cc0f07662c/misanobenowosumifozisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb7af89-80ae-497d-91f6-ba77c493056f/tedugovuvaniriwutig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b245af7-e206-413b-9a0d-545ee66950df/maximus_viii_hero_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33fcd50e-ec49-4dc0-81db-62ef80c4a122/mobaweguzelevoruju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e6aeac1-666f-4fb3-94d4-4ad8b65d383d/30585730733.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/biology_short_questions_answers_for_class_11_chapter_wise.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/11438358468.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/82344823265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72710c7d-ac3e-498b-8ceb-81a6961f309d/statistical_inference_for_data_science_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77839c6d-de92-40ee-9c14-fabc4a9af569/meeting_the_universe_halfway.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/the_complete_guide_to_asperger_s_syndrome_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/83522114025.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/hogwarts_acceptance_letter_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/grammar_of_english_language.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_off0000642a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642A 5112 bytes
SHA-256: 65068909127f5fd83e6273628ad704088ec5a209979b8a52618bd031b52b6c52
font_01_sfnt_off0000758a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x758A 9856 bytes
SHA-256: 89f69dadb3c9c6370bb44e8d68d946e6d0953966f5cbcc40a97dab76d8c75c51

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