Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6215fd5a0ee455…

MALICIOUS

PDF

74.7 KB Created: 2021-06-14 04:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 39464729d3998a6f47965f89b7d34080 SHA-1: 6648b67776d6f1d5b3786eaa2934a456a7be7e48 SHA-256: 6d6215fd5a0ee455d351d95f8e1cef6e659c165cbe800f6f2b0db3c68a56e9a5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'seumenha.ru', suggesting a phishing or redirection attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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://seumenha.ru/123?utm_term=bursasporum+ba%25C4%259F%25C4%25B1ms%25C4%25B1z+taraftar+platformu PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426945/normal_5fc6b51dbff4c.pdfIn PDF document text
    • https://wipovatoz.weebly.com/uploads/1/3/4/0/134012317/bc354741fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463554/normal_60c5a145e21d9.pdfIn PDF document text
    • https://xezitolisaja.weebly.com/uploads/1/3/1/4/131406502/pedaxomipi.pdfIn PDF document text
    • https://jufoximivovanad.weebly.com/uploads/1/3/4/0/134013024/dapubolaxedufex.pdfIn PDF document text
    • https://ladipepisosixas.weebly.com/uploads/1/3/4/8/134898905/67660b846c6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454179/normal_5ffb7771e99e8.pdfIn PDF document text
    • https://zipakodexosif.weebly.com/uploads/1/3/5/3/135344546/pezigitagu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jebusolole.pbworks.com/w/file/fetch/144643506/unbreakable_full_movie_download_in_hindi_480p.pdfIn PDF document text
    • http://buxuxeza.pbworks.com/w/file/fetch/145236771/kajururo.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/f/wiwuvi.pdfIn PDF document text
    • http://sowenux.pbworks.com/w/file/fetch/145236240/banexowuwuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e0b16b6-743e-4d9f-880b-32c00fb89504/78686339811.pdfIn PDF document text
    • http://siruzosu.pbworks.com/w/file/fetch/144446715/how_to_install_dlc_gta_v_ps3.pdfIn PDF document text
    • http://donigipoz.pbworks.com/w/file/fetch/145011657/kogilokopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ddd819-baa1-4a46-849b-5bae2e1028b6/individual_basketball_shooting_workouts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67272ed8-a74b-444a-9b38-f0af27e804ea/books_like_crossfire_series_goodreads.pdfIn PDF document text
    • http://lodenapokot.pbworks.com/w/file/fetch/144790542/exercice_triangle_rectangle_ce2.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_off0000e2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 5548 bytes
SHA-256: 85bb23fbf830d7c1c0bf465a5a9ca7f18b9a07f9fd2c045d570ecb135560c0e4
font_01_sfnt_off0000f5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A8 12200 bytes
SHA-256: 913afd1925e70b084c4cff9c0449c7b88fed757a8c678c19e928b34140d5ba8a

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