Malicious PDF — malware analysis report

Static analysis result for SHA-256 531e00d7bfa2d696…

MALICIOUS

PDF

83.3 KB Created: 2021-02-27 16:07:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 471e8ff5bfa4dcb6d6cc6a50a46c6b70 SHA-1: 3a768d88de9d3a5ad811c31bac682b32dba65126 SHA-256: 531e00d7bfa2d6966ecc3e9edf4549269141001c92791a1e0159363cfedd1312
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The embedded links, such as 'https://dafemum.ru/wix?keyword=stanley+st400+garage+door+opener+manual', are designed to lead users to potentially harmful sites. The ML classifier also strongly indicated maliciousness, supporting the overall assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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.
  • 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://dafemum.ru/wix?keyword=stanley+st400+garage+door+opener+manual In PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/a2b2bced38b.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/djfthc4/97629876793.pdfIn PDF document text
    • http://nuverlites.online/7954886387cuzto.pdfIn PDF document text
    • https://kofepuxola.weebly.com/uploads/1/3/4/7/134718869/gibofiz.pdfIn PDF document text
    • http://tumbochka.space/vietnamese_book_of_guerrilla_warfarew8pjk.pdfIn PDF document text
    • http://talezoruvaje.iblogger.org/jenn-air_stove_troubleshoot.pdfIn PDF document text
    • http://cabinetshq.xyz/how_preschoolers_learn_bestz86q4.pdfIn PDF document text
    • https://cdn.sqhk.co/xederebat/bhhifif/salolufikerutatij.pdfIn PDF document text
    • http://iglivesupportteam.com/parallel_circuits_worksheetkj0ig.pdfIn PDF document text
    • http://shoppingyxplus.xyz/fusion_360_windows_10_won_tp0c3z.pdfIn PDF document text
    • https://cdn.sqhk.co/xafogatok/jVxzad6/minecraft_2b2t_timeline.pdfIn PDF document text
    • http://teenagetutor.net/sorting_techniques_in_data_structuremzqwo.pdfIn PDF document text
    • https://lonamejekewow.weebly.com/uploads/1/3/5/3/135396766/burelaxix.pdfIn PDF document text
    • http://natikolom.site/cabela_s_big_game_hunter_downloadzket9.pdfIn PDF document text
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/1cf7df3e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/best_web_browser_for_pc.pdfIn PDF document text
    • http://borarujedumamut.epizy.com/borufonozonof.pdfIn PDF document text
    • http://buzawasilugije.epizy.com/math_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/internal_control_framework_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/67390700784.pdfIn PDF document text
    • http://bosirizowu.rf.gd/4559306761.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_off0000f5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 5412 bytes
SHA-256: ef1d47a6f98461fce861301095dba6a0adcede5d911ba195f834259250b23bad
font_01_sfnt_off000108b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B6 5712 bytes
SHA-256: d11c1e1edede10422df72b65268c2c8aa4c5677c9163dfa5273db5e80f268386
font_02_sfnt_off00011c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1E 10208 bytes
SHA-256: f034eaa662d04bbcd764c49a3d5bf4176cc386f12c89741407f8b5178c303411

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