Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e5c65bde852701…

MALICIOUS

PDF

83.9 KB Created: 2021-03-21 09:53:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ad721c18a8f2535b04e4a45f979e3747 SHA-1: 5e3cd063279da8e450093c21f8d8960ab5ab93cb SHA-256: e2e5c65bde8527016dd5d70814e594d8078930db3b724a5f455b5ea1f9c2155d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/strik?utm_term=how+do+you+know+if+you+have+a+sinkhole+in+your+yard PDF link annotation
    • http://ruwemipuwev.mypressonline.com/47773382014.pdfIn PDF document text
    • http://usacreditmonitoring.info/82187892177fin5z.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/fb6752ff.pdfIn PDF document text
    • https://vavaxurose.weebly.com/uploads/1/3/0/7/130775274/861b63e238af64.pdfIn PDF document text
    • https://lurevovikofa.weebly.com/uploads/1/3/4/6/134693735/xibejaxikuf.pdfIn PDF document text
    • https://nagipabusodeza.weebly.com/uploads/1/3/1/4/131453106/2f9aa495511.pdfIn PDF document text
    • http://wabiferofuvud.mygamesonline.org/riwezuwikenuf.pdfIn PDF document text
    • https://kezexawu.weebly.com/uploads/1/3/0/8/130814062/269727e7a6e748.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/2493440233.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/xepipexip-bafanupow-kutibuku.pdfIn PDF document text
    • https://jovigazever.weebly.com/uploads/1/3/1/6/131637362/4322642.pdfIn PDF document text
    • http://jsexj.fun/zupasuqixo.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/goxiz.pdfIn PDF document text
    • http://seweripuwas.mywebcommunity.org/xojatexetowikoduxaxapo.pdfIn PDF document text
    • http://suzupuwejal.mygamesonline.org/alpha_male_body_language_pictures.pdfIn PDF document text
    • http://gravkamen.ru/example_of_formal_chemistry_lab_reporthhsgp.pdfIn PDF document text
    • https://kadonomu.weebly.com/uploads/1/3/1/4/131454950/kotubitipufi_nivideti_fufasopegen.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/petsafe_healthy_pet_feeder_manual.pdfIn PDF document text
    • https://bixarina.weebly.com/uploads/1/3/1/0/131069915/2520988.pdfIn PDF document text
    • https://kagozekexep.weebly.com/uploads/1/3/5/9/135956698/6905476.pdfIn PDF document text
    • https://tubemugipowiw.weebly.com/uploads/1/3/4/3/134345788/4067004.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://relivoziz.atwebpages.com/niririfewu.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_off000108f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F9 5272 bytes
SHA-256: 70fc23f11ea1cf2ada8a6d7f7144fbc419f7c4922f44df33a8fad9f478987fa9
font_01_sfnt_off00011aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFF 10784 bytes
SHA-256: 75f3c8813ceae5c10260ead11c683785683bc40d2960f910e33c8df01c683c90

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