Malicious PDF — malware analysis report

Static analysis result for SHA-256 94524481e36cff9d…

MALICIOUS

PDF

71.8 KB Created: 2021-01-19 05:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2563eed31004835a4e6ffd1ae4a0d815 SHA-1: d25640952672f5fc6a8cfdcb03cedff3afbc3d7d SHA-256: 94524481e36cff9d62bc6ccbf05aac8b33283f436cdc2b671c15314b557b072e
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the large number of extracted URLs suggest the document is designed to redirect users to potentially harmful websites, possibly for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/123?utm_term=making+and+breaking+the+grid+second+edition PDF link annotation
    • https://site-1175739.mozfiles.com/files/1175739/coronavirus_test_near_me_cost.pdfIn PDF document text
    • https://lutatodu.weebly.com/uploads/1/3/4/6/134697406/810233.pdfIn PDF document text
    • https://bufigolumixi.weebly.com/uploads/1/3/4/2/134234787/dofunom_nerawogog_fosulopew.pdfIn PDF document text
    • http://xulenegutuwovi.iblogger.org/entrepreneur_magazine_philippines_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/cieujfx/reborn_in_a_magical_world_anime_episode_2.pdfIn PDF document text
    • https://site-1177077.mozfiles.com/files/1177077/61061067886.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/wuzeki.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/ihijaic/water_simulation_software_free_download.pdfIn PDF document text
    • https://site-1199244.mozfiles.com/files/1199244/voltage_drop_formula_uk.pdfIn PDF document text
    • https://site-1242313.mozfiles.com/files/1242313/japubefagodizigisisad.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/igFSGhh/monkey_bread_muffins_pioneer_woman.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://womopemi.epizy.com/47578043649.pdfIn PDF document text
    • http://wixevudu.epizy.com/32991288711.pdfIn PDF document text
    • http://rowomasogig.epizy.com/investigation_report_sample_template.pdfIn PDF document text
    • http://begosene.epizy.com/70086633990.pdfIn PDF document text
    • http://zulonojaminipe.rf.gd/potatazen.pdfIn PDF document text
    • http://betiravel.epizy.com/google_spreadsheet_app_for_mac.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_off0000dcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC5 5376 bytes
SHA-256: 3042f51c075c3035fd428dc93d9ddf83f5ddf675d753dfb20eadaf0ca4892c8a
font_01_sfnt_off0000ef17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF17 10576 bytes
SHA-256: 919e673a1bd9a96c0e99670a113d04ba5cba0eda41277ff8a02a2824d06e1b55

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