Malicious PDF — malware analysis report

Static analysis result for SHA-256 f220101d22133efd…

MALICIOUS

PDF

77.2 KB Created: 2021-02-25 09:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6c2223129642f67792fc5bb13e6d1a4b SHA-1: 80be0f368087fb68cdd749ae83e1672b57e5340b SHA-256: f220101d22133efd2b86728c55c7b16b9734878af84438c7c421dcd1a8d57e2b
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to link farms or disposable hosting, suggesting a phishing or redirection attempt. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://leonvi.ru/strik?utm_term=what+song+does+rose+sing+at+the+end+of+titanic PDF link annotation
    • http://idealica-ufficiale.site/how_to_do_psychoanalytic_literary_criticismxtlgy.pdfIn PDF document text
    • https://tugixafebav.weebly.com/uploads/1/3/2/6/132681891/3525695.pdfIn PDF document text
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/xovigofuwakivep.pdfIn PDF document text
    • http://wetebopoxegubu.iblogger.org/stalker_shadow_of_chernobyl_ost.pdfIn PDF document text
    • http://cartest.pro/what_is_the_electron_geometry22my3.pdfIn PDF document text
    • http://dream-stat.ru/nonazofelubiregapu79b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470828/normal_5fe73dd7b2988.pdfIn PDF document text
    • https://dazuzidasepod.weebly.com/uploads/1/3/2/6/132681566/gixorulo.pdfIn PDF document text
    • http://katermore.ru/67075640344edf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_5fe9a65775db1.pdfIn PDF document text
    • http://fastnoutservice.ru/masters_in_business_analytics_in_usa_without_greer1l7.pdfIn PDF document text
    • http://tur8osale.site/absolute_rc_heli_sim_hack_apknwf2n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mekonulegipero/rutavasigaraxotix.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/73710488271.pdfIn PDF document text
    • http://dibulokesimerog.rf.gd/old_maplestory_thief_guide.pdfIn PDF document text
    • http://jibujopebobusa.rf.gd/fagipabizogodu.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/american_english_file_4_test.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_off0000e27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27A 5052 bytes
SHA-256: 7745ce05e422b6a0caf8cb0399fb118feea8b523e7976d9b31ac57df1fe95a5f
font_01_sfnt_off0000f3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A8 10628 bytes
SHA-256: 60e4ccb180cbab8f24f9d7ca8037c287ea3dbf3458b79dc7b2ba854722a0a5e8
font_02_sfnt_off000117d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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