Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fab1007fc180f27…

MALICIOUS

PDF

73.3 KB Created: 2021-04-05 22:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 29f9c8461259304db8c1470710c0aff1 SHA-1: 5b4e702d6754b79cf58de45ff50c3047857dceee SHA-256: 9fab1007fc180f27dbf15477e60eb58bb7e38a30b2acfd13269240a8ef4e8aa8
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 0.9995

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://xezojetit.ru/123?utm_term=fdgrx+fact+sheet PDF link annotation
    • https://befunopokoxa.weebly.com/uploads/1/3/5/3/135327779/juwomuduxujose_xujurabori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457330/normal_601dd0c06f760.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/boy_in_the_striped_pajamas_movie_questions.pdfIn PDF document text
    • http://rotirir.mypressonline.com/8659026585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457861/normal_605f4e17e0ad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_6026424211256.pdfIn PDF document text
    • http://nicepics.xyz/benjamin_buttons_the_movie2571c.pdfIn PDF document text
    • http://my-favshoph.online/the_art_of_discarding8zomn.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/gym_workout_routine_for_beginners.pdfIn PDF document text
    • http://gprofights.ru/15228476434bkn04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_60531a262f06c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459936/normal_5fe4505fe85fc.pdfIn PDF document text
    • https://vimefipivarek.weebly.com/uploads/1/3/4/3/134310944/robunaxuse_pelas_jokenifo_tezaka.pdfIn PDF document text
    • http://usejus.pro/free_autocad_viewer_for_windows_10t32jp.pdfIn PDF document text
    • http://creditscorecard.info/dejesajemawa5qa0m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_916889eb974d492aa572f9b24613f616.pdf?index=trueIn PDF document text
    • https://c02a3fa2-970f-4384-b4fa-7a60184a1b73.filesusr.com/ugd/1da3fe_5ddebbfc683c412d8e47e56e1b651566.pdf?index=trueIn PDF document text
    • http://sebokegekesuded.atwebpages.com/manufacturing_engineering_manager_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/bitsat_online_mock_test_free.pdfIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_feaa3f35297f4183b000020b5936720e.pdf?index=trueIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/34833547688.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/bodawukevunorej.pdfIn PDF document text
    • https://www.cancer.gov/coronavirusIn 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_off0000e214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE214 5272 bytes
SHA-256: 2a0442762dce64e4eaff32ad0f72eabca9840fe7fac69232f154d941dbbcff28
font_01_sfnt_off0000f409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF409 10616 bytes
SHA-256: ae9805300dbe3cd698350c3035b9fad62fa0ef5b7d34f73cb9692ea75d9dbcd3

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