Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49878f9686b6135…

MALICIOUS

PDF

76.0 KB Created: 2021-03-19 11:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4cc77c289cfdc70806d065de9eb782e5 SHA-1: df4530d8dc770cc09e2c756df0112bf68ba18be0 SHA-256: a49878f9686b6135ab43f98163704a5ce7ed9fd672176d13bfe25779f4b949ac
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'fokemale.ru', which is likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests an attempt to disguise the malicious nature with seemingly educational content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=what+is+a+relative+pronoun+3rd+grade PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386822/normal_60487328e0b11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_603d4c60a544a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490138/normal_60021dd854328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5fd1f441c2c7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403814/normal_5fe3c3d416c7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_60320ffb68314.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372378/normal_60057fa21c92b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_600ceda863a1d.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/747ea46c-543c-4df0-aaf7-1ba213cb2ec0/the_secret_dare_to_dream_full_movie_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60cad94f-8209-4784-af9c-a939feb0f2d5/knock_em_dead_resumes_website.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/arsenio_lupin_ita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba2d7d7a-39d0-470e-9d9d-e4690f81458e/sexual_orientation_diversity_example.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/wastewater_treatment_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d0cbb6e-090a-4f30-bdb9-a8ca9ff315cc/ham_radio_technician_license_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/ssc_2018_ctg_board_marksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/307110dc-dfea-45d6-b424-9fd541c263e0/2018_subaru_forester_review_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/68330984372.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/87936711561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc801d7-1099-48c0-95a5-4d12e494991e/how_to_run_python_script_in_atom_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd7c5e3-540a-4529-aa02-9c9f2492b1a8/the_bluest_eye_novel_citation.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/guidewire_policy_center_10.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC26 5460 bytes
SHA-256: 67e8be66c10f6ee6702f4a278a1411b7e6ebfad27aaad74fe32a7be924f96ed9
font_01_sfnt_off0000febe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBE 10484 bytes
SHA-256: c80ddbaced9f01e6edc61bf80fa6189cab95415d85457f0fb938361626aebcdb

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