Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59082e893ec27d3…

MALICIOUS

PDF

80.5 KB Created: 2021-03-30 10:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2c9f395fe4a6e9781d0c50680473827d SHA-1: 51ace2f9fd71df6ce740dc39a7c8811982ead3f2 SHA-256: a59082e893ec27d34a56c91992d758d8680b8e97199d63cc6d7e5af7d9f88631
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant heuristic firing indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The primary malicious URL identified is https://botokaw.ru/wix?keyword=yugioh+serenity+feet, which is likely used to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/wix?keyword=yugioh+serenity+feet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4391008/normal_5ff65cb464e18.pdfIn PDF document text
    • https://cdn.sqhk.co/vekasurox/UhGpih7/3119810894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_60233c85f2113.pdfIn PDF document text
    • https://cdn.sqhk.co/gagunewatevo/fjjhaic/35959541184.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381082/normal_5ff966e73bc8e.pdfIn PDF document text
    • https://cdn.sqhk.co/kupujape/wSjiZVJ/gexiwig.pdfIn PDF document text
    • https://fibigator.weebly.com/uploads/1/3/4/3/134313363/5885825.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410199/normal_6039d8929f0f5.pdfIn PDF document text
    • https://binikefesomeb.weebly.com/uploads/1/3/5/3/135386190/030a4.pdfIn PDF document text
    • https://kafomepavazepa.weebly.com/uploads/1/3/1/4/131409794/2760800.pdfIn PDF document text
    • http://nifibegiro.iblogger.org/spoken_english_grammar_practice.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476429/normal_6007704652070.pdfIn PDF document text
    • http://kipuleli.iblogger.org/how_to_reset_motorola_surfboard.pdfIn PDF document text
    • https://cdn.sqhk.co/penuvipaw/hdF8Q32/how_to_say_light_housekeeping_in_spanish.pdfIn PDF document text
    • https://tesujirigagorin.weebly.com/uploads/1/3/4/8/134869290/nemutas-xupedumavez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zopefunexot.epizy.com/94350794332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d3914b1-afbc-40e5-9508-37ddd70db67c/fundamentos_de_marketing_digital_google_respuestas_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4638c3b4-eecb-4c42-b740-cc1a5fd79378/gluten_free_party_nibbles_recipes.pdfIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_d705c38a3f8a4ffc8f836e249b615161.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b7db9cb-87fc-4b7d-9caa-185a1f0d6210/dumotibegutonomojiga.pdfIn PDF document text
    • http://dexegudev.epizy.com/retaviradugak.pdfIn PDF document text
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_f3a10ea7d53842d68476c92462bf6cc7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d61892c-8175-4766-990e-11ab1885520f/how_to_eject_disc_from_xbox_one_console.pdfIn PDF document text
    • http://wamitut.epizy.com/hepatitis_autoimmune_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_off0000ffd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD0 4852 bytes
SHA-256: ecbf921f12867afff8f3c14561ce93e4c0b064bd3761831c22fda0b5927c3956
font_01_sfnt_off0001105f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105F 10716 bytes
SHA-256: e1911023ae25a1dd1d4d8060443d6c700e4e6b68cf597d1bf63c651fb573f078