Malicious PDF — malware analysis report

Static analysis result for SHA-256 574de824a11d0aa5…

MALICIOUS

PDF

74.6 KB Created: 2021-03-22 21:33:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b070bb4e253d3fc27b1a2c23b1579ef1 SHA-1: 90b318d4a973d6c9fbe031af4f615956809a16e0 SHA-256: 574de824a11d0aa53d8fc25815356998ff5d77474bea538ea0c61cc47994e41b
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 0.9996

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://gimoguvi.ru/123?utm_term=firefly+video+otoscope PDF link annotation
    • http://fb-copyright-help-from.com/144569916876m4p0.pdfIn PDF document text
    • https://zonujonuwug.weebly.com/uploads/1/3/4/3/134309714/8006578.pdfIn PDF document text
    • https://puwikopigab.weebly.com/uploads/1/3/1/1/131163601/6807256.pdfIn PDF document text
    • https://vusowixaxepuw.weebly.com/uploads/1/3/1/3/131381533/semapomejir-vesiritekok-perako.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457000/normal_5fce7c573b6b0.pdfIn PDF document text
    • https://zaboxunur.weebly.com/uploads/1/3/4/3/134369304/domevazexok.pdfIn PDF document text
    • http://free-at.pro/421682402765hrw1.pdfIn PDF document text
    • http://cleaner360.shop/minecraft_mod_1.10_2_bookshelf2fzl0.pdfIn PDF document text
    • http://erogancolumbia.site/rexusujavisenaperomavefe8fu56.pdfIn PDF document text
    • http://opssmall.space/file_from_blob_storage_javat8g45.pdfIn PDF document text
    • http://bazis-rostov.com/veleribisison9vnv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492546/normal_5ff2b315783c7.pdfIn PDF document text
    • http://kino-vezde.ru/swing_trading_options_coursetfva0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478387/normal_5fd878b9ec761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501233/normal_604925ce15684.pdfIn PDF document text
    • http://lapegokexixij.medianewsonline.com/pdf_splitter_download_free_windows_7.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://nabenejajoko.myartsonline.com/what_is_the_cub_scout_promise.pdfIn PDF document text
    • http://jagijib.epizy.com/movozaxagorege.pdfIn PDF document text
    • http://taroxul.epizy.com/vewodejo.pdfIn PDF document text
    • http://tizexazebubo.atwebpages.com/74148375224.pdfIn PDF document text
    • http://topufopotu.epizy.com/theorizing_posthumanism.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_off0000d8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CB 4740 bytes
SHA-256: 1d68144d65f871e9d87cf4e69d7480d858defc9393930e8a911208bc59918ad5
font_01_sfnt_off0000e90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90D 10600 bytes
SHA-256: 498a442f772eaa7fd36855b90cf6daeccf40b18c64f4542f1362528e22560ab5
font_02_sfnt_off00010d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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