Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ced456b4fb0fe1…

MALICIOUS

PDF

70.9 KB Created: 2021-02-14 03:26:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 56b37e711556209163f33139a86a4e65 SHA-1: 595c9c533d43ef1e9f8ca09cd7f3ea92caf65742 SHA-256: 02ced456b4fb0fe1def3f158af88b7d8ed5521e80a6c3f6a92534a3f87fb4023
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wb?keyword=elimination%20method%20simultaneous%20equations%20worksheet PDF link annotation
    • https://dutumeparozawa.weebly.com/uploads/1/3/1/1/131163590/7579499.pdfIn PDF document text
    • https://xomitemekebok.weebly.com/uploads/1/3/4/8/134881854/kugabijigeraru_dosepiwagejiju_nojedu_sazivimizekekod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417536/normal_5ff9e4896ab38.pdfIn PDF document text
    • http://zizopeja.22web.org/inadvertent_disclosure_form.pdfIn PDF document text
    • https://cdn.sqhk.co/mowuseparap/ePTKSjh/alexa_song_quiz_online.pdfIn PDF document text
    • https://jogotipopawufi.weebly.com/uploads/1/3/0/7/130740597/bopomawumisunav_feniliz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407064/normal_5ff60ed78d147.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460968/normal_5ffb36ee29777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_6010e7810c354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_60180ff668cd4.pdfIn PDF document text
    • https://webimilosajepi.weebly.com/uploads/1/3/4/8/134859137/woginifegidimopo.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/SijT0Pr/panic_button_movie_online.pdfIn PDF document text
    • https://cdn.sqhk.co/donewipimep/RTXzB1D/jagasilegoritejasizatuma.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/ibrjdja/flights_from_london_city_airport_to_belfast_international.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/2566761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481999/normal_602482f654e25.pdfIn PDF document text
    • https://pigabatanez.weebly.com/uploads/1/3/1/3/131380253/pomiwo.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://kifavudufolafu.epizy.com/the_octoroon.pdfIn PDF document text
    • http://welididoseburiv.epizy.com/zebosoxewugujevux.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_off0000cc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC68 5184 bytes
SHA-256: c29a3220f3218a86d077ff47455f530bb96b1f0d3c50d972ac18cb2c07680d79
font_01_sfnt_off0000dddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDF 9956 bytes
SHA-256: cc2fc08962a278d5f6c57b0cc182dab1813365cd3749ec432ec6e89b0f51c9a9
font_02_sfnt_off0001001d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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