Malicious PDF — malware analysis report

Static analysis result for SHA-256 8baa19f7278e52f9…

MALICIOUS

PDF

78.3 KB Created: 2021-03-18 13:37:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c9f9430853144cff0b00f1e95393b52e SHA-1: 12245d9da0d1a063a82f09cbcfa3fe6efb21be56 SHA-256: 8baa19f7278e52f9ffa7a71ec69061edb09dc56a59b36cef93cc0efa8ebe0953
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/wix?keyword=see+private+instagram+without+verification PDF link annotation
    • https://dinomorozowi.weebly.com/uploads/1/3/4/6/134610364/nawutotoribix-jinexewijaxozo-ruwabusa.pdfIn PDF document text
    • https://xiwajobuxeke.weebly.com/uploads/1/3/4/6/134637113/jiwot.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/ohjlRgg/falopurikivakiwisuw.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/Yicjdjg/angry_birds_transformers_unlimited_gems_and_coins_download.pdfIn PDF document text
    • https://cdn.sqhk.co/faxixuwako/igfidge/mazejiwinoviw.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxozamikoge/jwnu4hb/76681124357.pdfIn PDF document text
    • http://jegoxijiruvika.22web.org/where_can_i_buy_books_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/a5XbJ63/91491888121.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/jlTiijM/here_you_go_meaning_in_nepali.pdfIn PDF document text
    • https://litiwufedoza.weebly.com/uploads/1/3/0/7/130739575/454088380.pdfIn PDF document text
    • https://gawofatofuwe.weebly.com/uploads/1/3/1/3/131380275/5836484.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pebafuduzuxifa.rf.gd/3d_model_cars.pdfIn PDF document text
    • http://fusifovizit.rf.gd/why_is_smoke_alarm_going_off_when_no_smoke.pdfIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_447ff9d8ad6f48a1af3e594778b7a5ec.pdf?index=trueIn PDF document text
    • https://4db61c00-1078-4917-8a1c-a2c1480eb6e0.filesusr.com/ugd/c94206_84e803b341674f46a1f71d7e3ce8349b.pdf?index=trueIn PDF document text
    • http://beninoduvewer.epizy.com/dilusesoket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9dd5a1a-720e-4b99-bba5-5ab91f79920f/basic_physics_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebbdd5c0-024a-4774-aa3e-ab842305ebd1/82467400992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/767ce3d9-f156-4758-9c92-6bf9c7ffab73/como_agua_para_chocolate_libro_completo_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8560f265-1cf9-4b43-aa14-6fea3491daa6/maytag_centennial_commercial_technology_washer_and_dryer.pdfIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_cb2a1b6b66a84befbdf540432a35de26.pdf?index=trueIn PDF document text
    • http://fowudunomus.epizy.com/katalog_kabel_supreme_nyy.pdfIn PDF document text
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_ea1e9705b223433b826775bfb461c061.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2781fe02-c18b-4660-8f3e-d07fa28b4feb/samsung_printer_c460w_manual.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_off0000f4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DC 5652 bytes
SHA-256: 3a5dee36729871eca3a58eaf7cbb2214e2de31c074d556e9b55983e0de4435a1
font_01_sfnt_off00010804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10804 10240 bytes
SHA-256: 543b0dc86b839a0fe9885648f76c62cb1b4232301d9e0b580ad950aed65cd12a