Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f5227b0f1494a7…

MALICIOUS

PDF

67.2 KB Created: 2020-12-06 08:49:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8b1585b5753c761c0c876af420d03f72 SHA-1: 0910487774a96d0731035d7ecbc5e910010f9262 SHA-256: 95f5227b0f1494a7288fe3ae0b9cfa117f0f6643ad82bba81130b534939283e3
264 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits multiple indicators of malicious intent, including brand impersonation for credential phishing (Gmail) and a password-protected archive lure, suggesting an attempt to bypass security controls. The presence of external links, one pointing to a redirector and another with a search term for bypassing Android security, indicates a likely attempt to deliver a malicious payload, such as an APK. The ClamAV detection and ML classifier further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://bulipabuwalo.weebly.com/uploads/1/3/4/1/134131868/3a8575ec2c8f9c6.pdf.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffine.ru/strik?utm_term=easy+frp+bypass+apk+6.0+download PDF link annotation
    • https://bulipabuwalo.weebly.com/uploads/1/3/4/1/134131868/3a8575ec2c8f9c6.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/vuwuguzaga_woretabigef_lupadupolijika_goligu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc1954caffbf90a66ef50b6/t/5fc57f3ce18c5c478eb6bae2/1606778684442/ridetirokebilojifenuk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52342e2fce462bca75e82/t/5fc75cbe93ad1a48121a8d23/1606900927497/genesikaxatelus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc563a5a3bf4b14abc71da8/t/5fc8f83156f72563b2d0eea3/1607006266077/solar_system_project_work.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/anarkali_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/absentia_laurie_reporter.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a55868612547ed6365a0/t/5fc95ef9181acf12b8331c3d/1607032570366/16060283435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a67e6e9-e242-4402-85d8-8e21d8eaf695/your_hands_can_heal_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaafd531-f308-4181-ae08-829872f790c6/sodulujatofitadij.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52335cd1e280355efa049/t/5fcb4dcb393ce473563139c1/1607159243823/jedafefolusefetiv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64b09f7cf8c75404f74c5/t/5fcc59745177ea328cb83c93/1607227765080/seteza.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBACB 5260 bytes
SHA-256: d715d0ad63071cfca8fc212e470fe394c1c0af49bdc8fcba6c5ba986a9446556
font_01_sfnt_off0000ccc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC4 11068 bytes
SHA-256: 3bd0afad791b7bd992700205a4b47379cd65eb17c9d862e624fba6271273e433
font_02_sfnt_off0000f221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF221 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71