Malicious PDF — malware analysis report

Static analysis result for SHA-256 3adcc7395076b9c7…

MALICIOUS

PDF

105.7 KB Created: 2021-02-15 05:04:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f85e0a3b101bbd12311fd2d06ba8d88e SHA-1: e38b72929eb93b1a5a3d11358396d57610391e35 SHA-256: 3adcc7395076b9c7eaf3acccb7f196e15188a1955ef6a74f6614963b8c547117
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://leonvi.ru/aws?utm_term=castlevania+symphony+of+the+night+ps1, is likely part of a phishing or social engineering scheme, disguised as a link related to the game Castlevania Symphony of the Night. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/aws?utm_term=castlevania+symphony+of+the+night+ps1 PDF link annotation
    • https://cdn.sqhk.co/wunokebewoz/VwPAbkV/clear_wikipedia_search_history.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/jcHljd0/hide_and_seek_imogen_heap_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/juxefirapuf/igihD0x/wosoxawoxonaladukosamop.pdfIn PDF document text
    • https://cdn.sqhk.co/gorisaburo/gcWLjhb/98029283203.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/jhfdAhb/63478781234.pdfIn PDF document text
    • http://indonesia2health.online/almanca_yds_hazrlk_kitab_indirg0t9p.pdfIn PDF document text
    • https://cdn.sqhk.co/xezufulozuwo/icRTwjh/geometry_dash_unblocked_level_1.pdfIn PDF document text
    • https://cdn.sqhk.co/sagitusat/ficjjCg/victory_day_parade_2018_in_moscow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nisuzadusidu.epizy.com/lcm_and_gcf_worksheets_grade_5.pdfIn PDF document text
    • http://vorasatijede.rf.gd/wasigise.pdfIn PDF document text
    • http://xapimiwosusuv.epizy.com/fox_entertainment_tv_guide.pdfIn PDF document text
    • http://pupekulojam.epizy.com/manualidades_faciles_para_nios_5_aos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000137bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137BF 12444 bytes
SHA-256: e953906bec67346d7a27816eab389bc5d2fc53b3d3995d26939f1caf5988e662
font_01_sfnt_off000160a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160A3 5340 bytes
SHA-256: e2ea02ed78a6043e946557cf4cdf63408545401b727a28979341d12f03b0652e
font_02_sfnt_off000172c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172C2 11548 bytes
SHA-256: 87a314873d0198f5af51b4f28e88544c3285ffc5ad4eda49a256c5c9c68461e2