Malicious PDF — malware analysis report

Static analysis result for SHA-256 dddd05af70c9c536…

MALICIOUS

PDF

85.0 KB Created: 2021-03-23 17:15:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5de7b06b5d9bd7ca5d31f2f8d4e2b75b SHA-1: 80bb7cb39939fcd5c4bfcd1c36f36a235e833402 SHA-256: dddd05af70c9c536f0a1f4f3ffb9e5b916aa1efbb12f3f7062a35da7e818771f
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-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://baarspo.ru/123?utm_term=fire+emblem+three+houses+maddening+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375907/normal_602e42586c542.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/anatomy_of_heart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385216/normal_5fc810d577049.pdfIn PDF document text
    • http://vopezikililurab.mygamesonline.org/annales_brevet_maths_2020.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/33203373332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419192/normal_6049bb9e5511c.pdfIn PDF document text
    • http://xibawolafubiz.getenjoyment.net/30215161752.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407314/normal_600818dd67cd1.pdfIn PDF document text
    • http://sokobumoxagug.scienceontheweb.net/fuzubokaxiroxaxun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491151/normal_6044a01e254ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456134/normal_60013479944c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_60401ac51f739.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460447/normal_5fcaf7238618d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/petubapizo/86401311987.pdfIn PDF document text
    • http://bujijawuta.atwebpages.com/89207357907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc3f3bff-da77-45cf-96ec-69f8721347d2/getugapunam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b072c25c-627a-45b5-9751-d41334fd5da4/mefaginidesumikep.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/kenmore_elite_oven_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ace53a9c-9d87-4121-92e2-dd8b82bee95a/50455377737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5431c64e-7483-4ef2-b167-f066a6856522/how_do_i_install_scansnap_s1300i.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/9646856250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4be8b1a-ca28-4e40-af5e-2c88e2ed843b/mafupufevefiw.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/pibozonajupitefofubeb.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/kasixajavifozavivovedefed.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/sixanowewedefufamib.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_off00010ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF0 5332 bytes
SHA-256: 0854100ed1abe31a6ea82dbd112cdb2ffa319ed93a3585ed1aee480805f8aff6
font_01_sfnt_off000121dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DC 10728 bytes
SHA-256: 360cb17d2354a7bf9f0a4d9a1c75c392b55b20f9771750138525d59c219f5f80

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