Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd288ade55a92762…

MALICIOUS

PDF

85.9 KB Created: 2021-04-01 11:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 23f6c879ef20b7079a278953b44cd2ff SHA-1: 9eab563d23156e6ce72fc26d29b72790cc644074 SHA-256: bd288ade55a92762858ff5d41b7fbb3a5f6dfeaefc7579991030f437f88ac7ab
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 0.9993

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/123?utm_term=bahubali+songs+telugu PDF link annotation
    • http://mukoxadetovewo.66ghz.com/pleasant_hearth_pellet_stove_replacement_glass.pdfIn PDF document text
    • http://firavowinoza.iblogger.org/logical_framework_sample.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5fe9a86ea56f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481985/normal_5fe8b81483e63.pdfIn PDF document text
    • http://xifizajutebov.22web.org/tukegabiwolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_60607af7d596f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_60309de6e09d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_605d873e7de6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485309/normal_6003309a74080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477162/normal_5fd33634e4114.pdfIn PDF document text
    • http://diwolekeku.22web.org/ftir_atr_spectroscopy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451018/normal_5fc5df2d7ad13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407102/normal_5feb6035dac65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pogifovemujure.epizy.com/34285226050.pdfIn PDF document text
    • http://zojiwedut.rf.gd/96931991202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca18b833-e61b-4af1-ad83-f3060bae6a2c/vafifoguwutogemek.pdfIn PDF document text
    • http://nupopagiwagivu.epizy.com/is_tai_chi_tea_good_for_you.pdfIn PDF document text
    • http://xarugutivi.epizy.com/android_browsers_with_flash_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2afeabe7-9a4e-417c-af69-ceb79dc4fa6b/yaesu_ft_897_repair.pdfIn PDF document text
    • http://kadinox.epizy.com/labaf.pdfIn PDF document text
    • http://rekeviwabevixuk.epizy.com/cool_resume_templates.pdfIn PDF document text
    • http://tugojan.rf.gd/matrices_math_worksheets.pdfIn PDF document text
    • http://vegiroromofi.rf.gd/pubesuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/643a7e5c-0636-4ca1-a3ba-6ca95fc26ecf/baby_bjorn_bouncer_bliss_pink_mesh.pdfIn PDF document text
    • http://magakawigola.epizy.com/petisibepalaj.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_off000115db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DB 5040 bytes
SHA-256: 4d83c0fd15cc2c17185a82361117b23a03c9466da085034cdfb001ced7cf6584
font_01_sfnt_off000126fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FE 10648 bytes
SHA-256: 94b7ebe51b66f5cbeaf4a6eaeb4a1b6191cfcb54aaca9f3a5f3ef35c55fc930a

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