Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9e502f88fb1e96…

MALICIOUS

PDF

81.6 KB Created: 2021-09-20 04:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ef4143e1e77e50823e4132de5ef17d0a SHA-1: 91da00b9927228be62f057feb6055465eff0e173 SHA-256: 6e9e502f88fb1e9605417ea4c038a0999d4ea85e7812211abe028126f1e4eb96
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links to potentially compromised websites and a visual download button lure, indicating an attempt to trick the user into downloading a payload. The presence of embedded URLs and the overall structure suggest it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://pistant.ru/uplcv?utm_term=how+to+unlock+a+pin+on+a+phone PDF link annotation
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16146c9f911df4---fumubon.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/baxejevupozopobuvudiz.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///54574205679.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/48969195465.pdfIn PDF document text
    • http://annabarons.com/files/files/piworutetufitir.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021091917582572.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613358110af59---zavobuwil.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/basifizijubilirotineso.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/45173389904.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/7958208261.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376c8f1f604---gixowumumumafajaro.pdfIn PDF document text
    • http://gabortech.com/admin/file/76359436010.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/90358835982.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/77072026211.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/73970250196.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/selonuxo.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/soniravar.pdfIn PDF document text
    • https://www.educationsexuelle-ecole.ch/ck/ckfinder/userfiles/files/xiwune.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140e3dc15421---25330961556.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/35220447078.pdfIn PDF document text
    • https://triosms.com/userfiles/file/topupepatulutog.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614354e5dde0d---wezowaviwag.pdfIn PDF document text
    • https://nieruchomosciturystyczne.eu/files/file/gunofivi.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/ritisu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 10472 bytes
SHA-256: 32dfbdf8d6cb9df1f4f517b7817ef4e727d4e42bbe586c64112af4d0b56f8084
font_02_sfnt_off00010a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5E 17928 bytes
SHA-256: e9826d2607b3dd4e23ce8f50f3668a1e4bba9f17a0b8b38ba095772fc133c847

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