Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d57868ee055fd1…

MALICIOUS

PDF

83.2 KB Created: 2021-09-01 05:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2b32410f08e69fda47b18c02f8390467 SHA-1: 60cf2e062c25cf9d7ba8c8d8e7b65faf02045ab1 SHA-256: 47d57868ee055fd1e6256484b1c5d5ff0d2c99fa859f570d30a8deeac5edf147
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the links indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=windows+cannot+be+installed+selected+disk+is+of+the+gpt+partition+style PDF link annotation
    • http://urbanconstructions.org/images/uploadedimages/file/bowagonejapodusag.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/rv0644btuavvaumes7sspst4hp/60510426785.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/87975915660.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/2e87643a4af6f692eeb2c575800541bf/23250648484.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/89361069161.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/doufhca8hqk57qal3jrtqgii4a/80695784091.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a261b16a663---mujizabikemarefuwez.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd695c3e69---92765116794.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/81210828228.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/8e8242830aedf13b0150bdb64788cb7c/levemalajobonufuburag.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/rejuwuxaw.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/37586bc5baeb78d455fae1bc24c618f8/14263388055.pdfIn PDF document text
    • http://hhtaitung.com/CKEdit/upload/files/44521797827.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/merusejejifaxivamobad.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/kva56ttl94jq189scp89n9h7n0/37965277496.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/93904557251.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/8827e9e6d9c2cb645806f3753dc7378e/96161623890.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/339e6c5ug719avgbtlcn44cig5/73456358870.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/nabulexadaka.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/warabawopekovorewetam.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9792e243f---20469467413.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a31c191a385---22817282308.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/kexamugigunazorida.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/29031732605.pdfIn PDF document text
    • https://newdesert.pl/userfiles/file/sovefazinup.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_off0000db89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB89 11324 bytes
SHA-256: e9b717211d931903e26a2c1ae4bd8d23e985a43b92ed1d9d820dec2056c8c2d5
font_01_sfnt_off0000f5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDF 18804 bytes
SHA-256: dfcabe187ee2e50c0383d8e5d09eba6ba4cc9bf7de50a03eba58d3ae44420b31

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