Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff6ced666a0da5f…

MALICIOUS

PDF

76.2 KB Created: 2021-04-01 11:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f167e1add8eecf1999ac7dc5a1bd1639 SHA-1: 103f11c6509e3d309d0798254f551b6afd832496 SHA-256: bff6ced666a0da5f53eaee90f5d3a6b617a707a4406258d7c19fec483b4c83fc
104 Risk Score
Tags
free-cdn-ebook-manual-lure

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 presents a deceptive download button. 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/123?utm_term=free+printable+graduation+cap+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379606/normal_60605e743b8ce.pdfIn PDF document text
    • http://wssummer.space/17120867445zapmi.pdfIn PDF document text
    • https://kivisibef.weebly.com/uploads/1/3/0/7/130775328/lubejerigasuretapun.pdfIn PDF document text
    • http://m-laskin.ru/unitedhealthcare_provider_number_authorizationby5b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_6045d593223b8.pdfIn PDF document text
    • https://wutuzorul.weebly.com/uploads/1/3/5/9/135963099/nalawowomininep-fapawurago-xakulipovet.pdfIn PDF document text
    • http://hookup750.website/5233441330132755.pdfIn PDF document text
    • https://zixikaro.weebly.com/uploads/1/3/5/3/135301636/gadibodekegorotav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420020/normal_5fd3bdae4000c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463824/normal_6059caf75ae94.pdfIn PDF document text
    • http://umniashka.ru/drum_set_online_machine27ec4.pdfIn PDF document text
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/4e9413b4a395f.pdfIn PDF document text
    • http://copyrightreports.com/marevezetaxorusg4pys.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabasil.epizy.com/arifureta_light_novel_volume_8.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/bedotegoj.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/18354285489.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/wusupevivuvowapul.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/kobofu.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_eb5ee87ea44641f6b131a7ec656ebc4a.pdf?index=trueIn PDF document text
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_1ff1eaa069de4af6873a6d01e3664a42.pdf?index=trueIn PDF document text
    • http://wuxojawe.epizy.com/23217390637.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/85482946223.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_off0000ebe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE2 5308 bytes
SHA-256: a850dedabf3c8312899c717b6ce98d0bb2ab70bc9342479a6ff852cc83d15d4b
font_01_sfnt_off0000fdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD9 11100 bytes
SHA-256: 20616ccce3ca629c5037b6c7f0202d9de8a9db33adbe813b8318039927550599

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