Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e92161f18c34257…

MALICIOUS

PDF

89.5 KB Created: 2021-02-19 21:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: af57c4b4797a36064406e97b6834b7c7 SHA-1: 7f4455b4c84e78e3d7b7d8eefd514be8ed854e5d SHA-256: 1e92161f18c34257bf12cabee0151958ac948d285c3d6ba1613686e5f19effa4
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, pointing towards a phishing or malware distribution scheme. While no scripts were extracted, the embedded URLs are the primary indicators of malicious activity, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=morrowind+creatures+uesp PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366406/normal_5fca7b48328b0.pdfIn PDF document text
    • https://cdn.sqhk.co/sirazisiluz/VEmfhac/surviv._io_wiki_changelog.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/how_to_install_racemenu_for_sse6sm09.pdfIn PDF document text
    • http://my-favshopf.online/viparigagedavarunegurija66akw.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/bjhFvjc/netflix_original_christmas_movies_2019_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445864/normal_5fcf9a2470dcf.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/solvency_and_liquidity_test_templatehzbvr.pdfIn PDF document text
    • http://electorat.org/ecppt_exam_reportm9d2d.pdfIn PDF document text
    • http://notdull-eng.online/24238893354gdau3.pdfIn PDF document text
    • http://arenaprobet.com/10691962319dp9rh.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/kiije7H/checar_tu_saldo_at_t.pdfIn PDF document text
    • https://cdn.sqhk.co/kowaziwaso/T6jdogj/poe_elementalist_build_path.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479684/normal_5fde057e5dcfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_600bb25fec7c4.pdfIn PDF document text
    • http://heleogose.online/chromedriver_selenium_filebbigw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5fc8632e86bd9.pdfIn PDF document text
    • http://mixed-rootwork.com/aamc_mcat_practice_exam_1_answer_keyqtdnb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456389/normal_60135a8da3e85.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/kisimujuk/71427883214.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/edit_your_files_online_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/89062512875.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/conscious_sedation_endoscopy_guidelines.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_off000119ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EE 5132 bytes
SHA-256: f85508a59addda2f8bbafb49bf6f06646d34067de1ed88faaa399bda8d377a9d
font_01_sfnt_off00012b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8B 14456 bytes
SHA-256: a26298ce68d25b76c25f2ade40d4506c3d441255032938b965fc188256ee9274

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