Malicious PDF — malware analysis report

Static analysis result for SHA-256 000a3723fd690b9e…

MALICIOUS

PDF

76.6 KB Created: 2021-02-25 19:10:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 55fba7785245135e15b8a9c88f91b82f SHA-1: d2fe2ac2b0f432c48cc5efd101ec645f8fed948c SHA-256: 000a3723fd690b9eada5dc2f4c63075e5abede0cc5d892496743419524436e12
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to reference product installation, a common lure for phishing attacks. The presence of external URIs suggests an attempt to redirect the user to a malicious site for further exploitation.

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://seumenha.ru/wix?keyword=eddie+bauer+quadtrek+travel+system+base+installation PDF link annotation
    • https://lonumuzab.weebly.com/uploads/1/3/4/2/134234730/ea21363a4e6f9.pdfIn PDF document text
    • https://radufogerexe.weebly.com/uploads/1/3/4/2/134265868/zodevibalep.pdfIn PDF document text
    • https://cdn.sqhk.co/kigoxeni/el9Z3hi/royalty_free_music_for_videos_app.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/97170090952.pdfIn PDF document text
    • http://vesimawamom.66ghz.com/64343000691.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/euLjfgf/arcade_donkey_kong_download.pdfIn PDF document text
    • https://wigabededonekan.weebly.com/uploads/1/3/0/7/130740374/nokeko.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/jehaM2Q/call_of_duty_warzone_xbox_one_price.pdfIn PDF document text
    • https://fefodenajefive.weebly.com/uploads/1/3/1/4/131437461/173526.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
    • http://sazojojuw.rf.gd/pawuxelosofajuf.pdfIn PDF document text
    • http://mosokiwilag.rf.gd/insert_excel_sheet_into_powerpoint.pdfIn PDF document text
    • http://jabelakejirer.epizy.com/ridifu.pdfIn PDF document text
    • http://zobawukesilebaf.epizy.com/parallelism_worksheet_one_answers.pdfIn PDF document text
    • http://laposul.rf.gd/guided_media_and_unguided_media_in_networking.pdfIn PDF document text
    • http://nuzoniwetavo.rf.gd/ropikasogodemizanemaf.pdfIn PDF document text
    • http://nisijavifusepov.epizy.com/52137460857.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_off0000e0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DC 5304 bytes
SHA-256: b95cdff831aded32de8d0c6d54dd3769dd4834b4e1da68daa5f752aa1d75de30
font_01_sfnt_off0000f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D2 10432 bytes
SHA-256: c9a6a51654588281211858fd5b122219a6300ef284b483e72115dd288117050d
font_02_sfnt_off00011656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11656 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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