Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3da9f45e1f30f0…

MALICIOUS

PDF

74.0 KB Created: 2021-02-26 12:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4bb9b81dde497707e91837162a11b2e2 SHA-1: 2fbc2e11c743ae55a8ccbaf42dd1821ac1fb4c38 SHA-256: ce3da9f45e1f30f0eff07044a8f3fcb4c702e50149d5b31bb24431626e6bb0c2
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://xezojetit.ru/strik?utm_term=developmentally+appropriate+practice+in+early+childhood+programs+ppt PDF link annotation
    • http://robugipunebib.mygamesonline.org/rule_12b-1_plan.pdfIn PDF document text
    • https://bigifami.weebly.com/uploads/1/3/1/4/131407708/1954638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462046/normal_6024582d1a3b1.pdfIn PDF document text
    • https://luwegojozokozop.weebly.com/uploads/1/3/0/9/130969796/9b3c85a1a983256.pdfIn PDF document text
    • http://xivagoz.22web.org/tezegofozobane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_60134d89b44fe.pdfIn PDF document text
    • https://pomavedakese.weebly.com/uploads/1/3/1/8/131871772/8674966.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446649/normal_5feba5e488b47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vemewef.rf.gd/top_books_for_success.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/floral_vector_design_templates.pdfIn PDF document text
    • http://pitikepaz.epizy.com/kafuzoxegibenovo.pdfIn PDF document text
    • http://bikemeno.rf.gd/3547508791.pdfIn PDF document text
    • http://pipiwilevo.rf.gd/gafipudolosiwemudetibigo.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/sundance_spa_models_2006.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/comparative_superlative_forms.pdfIn PDF document text
    • http://nexizali.epizy.com/zotiwexosuludabufij.pdfIn PDF document text
    • http://ximolamerojizud.epizy.com/manchester_united_leicester_match_report.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/79599761406.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_off0000e356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE356 5648 bytes
SHA-256: eead2cda524486b1073b3556a4e7996b2136015d62a2a59c1df4444720207876
font_01_sfnt_off0000f672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF672 10420 bytes
SHA-256: 7d4a954bf8f4933b07e0193da23fea54ae3f13f71c25e4cb30256c60c03a14ce

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