Malicious PDF — malware analysis report

Static analysis result for SHA-256 82842bbf700d3864…

MALICIOUS

PDF

75.1 KB Created: 2021-06-11 03:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c756f694d956fecd157c9e409d440c5f SHA-1: 1eb56b9b8b8fc65aaf66d7f2e34f625b31445a44 SHA-256: 82842bbf700d3864d46d4dcd6346a7a34158abf01a264552725a86ee5f3c8bc6
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-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://inwebjor.ru/pbw?utm_term=windows+activator+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401515/normal_60654d419138c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452863/normal_5fe5ad1e29a34.pdfIn PDF document text
    • https://jimoporifu.weebly.com/uploads/1/3/4/3/134378689/mirasuk-gakujumebi-rujizaxepi.pdfIn PDF document text
    • https://dutudofedibajun.weebly.com/uploads/1/3/2/8/132815365/powutifiwavug_vozalewuzido_ximerodazus_mofowutude.pdfIn PDF document text
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/5535908.pdfIn PDF document text
    • https://gawupuvuto.weebly.com/uploads/1/3/4/5/134530234/56b8a41a6d57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuvikix.pbworks.com/f/12191645768.pdfIn PDF document text
    • http://sozevupegufi.pbworks.com/f/lajokowomikuzibebirefob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc83e01-4623-4857-83ab-36e8bb1ace79/why_is_ge_dishwasher_not_draining.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dead30f6-9fff-415c-b1b4-8eae547301dc/a1c_conversion_chart_canada.pdfIn PDF document text
    • http://zuvuzut.pbworks.com/f/gods_of_egypt_full_movie_hindi_download_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228a770e-fbe3-494c-914c-3798d83639d5/los_rios_de_color_purpura_serie_ver_online.pdfIn PDF document text
    • http://mituxap.pbworks.com/w/file/fetch/144661002/spanish_ar_er_ir_verb_endings_chart.pdfIn PDF document text
    • http://lakejidumap.pbworks.com/f/how_to_know_original_victoria_secret_bombshell.pdfIn PDF document text
    • http://lujugusoderu.pbworks.com/f/29980886424.pdfIn PDF document text
    • http://mabigeroxoso.pbworks.com/f/printable_2_year_calendar_2021_and_2022.pdfIn PDF document text
    • http://xobapotowi.pbworks.com/w/file/fetch/144698526/kituxik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69f1acbb-ee24-49ff-be9c-a0d8f9294ec7/73522057577.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/barry_windsor_smith_conan.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_off0000eb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0E 5100 bytes
SHA-256: bdee898784450e00517c6f3a5ede4a6f6f180a47345dabeab4d0d5cb82661368
font_01_sfnt_off0000fc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC92 10224 bytes
SHA-256: f5f1e06c88219ee6c30ea3e4d61ee6110d1a2d970437833ca4b627f82aa3112d

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