Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eab858e13b1d82e…

MALICIOUS

PDF

76.7 KB Created: 2021-03-09 01:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 76f992619363b6d567f0f1bf02b1f116 SHA-1: 5f64c8891571016d36762f3f750980016b0a3bc9 SHA-256: 4eab858e13b1d82ef3244ea694365e342c39654cb957ae1afaf2442b30258c71
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 0.9997

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://soxebez.ru/123?utm_term=antibiotic+sensitivity+testing+lab+report PDF link annotation
    • https://cdn.sqhk.co/lokutibu/bSdheig/virtual_canva_social_media_graphics.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/2d4hd3S/92668980609.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495244/normal_60071b4d67c2d.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/the_mouses_tale.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/figofofeseruw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459482/normal_6026816d3ee0a.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/jipUz93/55039238544.pdfIn PDF document text
    • http://wedevaz.sportsontheweb.net/what_girl_names_mean_powerful.pdfIn PDF document text
    • https://cdn.sqhk.co/kipezipilojo/jd6hcID/shell_m_racing_oil.pdfIn PDF document text
    • http://zizopeja.22web.org/sean_paul_trumpets_ringtone.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/harry_potter_and_the_goblet_of_fire_full_movie_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411694/normal_6029f548deb47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b183536-8115-4b8c-8bd2-4e060ac1b8d8/92392976094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3139b8b8-830d-463b-b18a-96ff11d416cb/bunesinevoragepekagip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e881e0e-67a2-4be8-8794-6fda19503515/little_shop_of_horrors_dentist_broadway_lyrics.pdfIn PDF document text
    • http://resilasijajatil.myartsonline.com/coachmen_motorhome_for_sale_australia.pdfIn PDF document text
    • http://wubonaxe.epizy.com/fidoj.pdfIn PDF document text
    • http://zigatikix.rf.gd/how_to_find_my_play_store_app.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/oh_how_he_loves_piano_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a788966-be63-402a-bcf5-a43b246eab22/dumarupepitutajoxe.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_off0000f01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01A 5392 bytes
SHA-256: dd47e196b10d2a0587856cd31998da22505d827064fb4c504c5317e6a59033a4
font_01_sfnt_off00010294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10294 10276 bytes
SHA-256: 965a3ef48a6231043164ad4e96e638a9e9d38595bf41b6ea60fbde4dcad6ea3f

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