Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fe74b00bbb8791…

MALICIOUS

PDF

77.6 KB Created: 2021-09-10 12:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 13f9ffadaeb945a66c278e3e99ed5510 SHA-1: c2f234f279e53c40b76d52275bb4d75b42e6dd1e SHA-256: e7fe74b00bbb87919a4f86a4b200279c1515617592e9a768c129a840c0f1d757
126 Risk Score

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 0.9992

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 http://www.bluewhaleline.com/image/upload/File/dixus.pdf In PDF document text
    • https://hkfew.org.hk/ckfinder/userfiles/files/xakixixu.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/58a790bbf058da85a9a2d4e9f0da2f1d/xalujigizexi.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16131f1bd171ed---51687679818.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/37392161035.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/xunogiz.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/gebuvifudibu.pdfIn PDF document text
    • http://anbc31.iscriptscloud.com/app/webroot/files/file/27216440074.pdfIn PDF document text
    • http://101balkon.ru/upload/files/58036578592.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/bavifud.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/vuxokerinifenawim.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-3/20210903225628236208.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210908_28B8409EE4B2BBEC.pdfIn PDF document text
    • http://gleb777.com/fck_upload/file/95102481313.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/64834528650.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/12625629542.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/tuxivavanujazovuseja.pdfIn PDF document text
    • http://nature-revive.org/files/file/bitekalefozitag.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/mowudamexugiguve.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/tipawitoroteroxinozi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=download+advanced+english+tigrinya+dictionary+apkPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 11152 bytes
SHA-256: 892260944582c05955ebf754ab700f68d9ce5833e9558f315464a2f4e5018af6
font_02_sfnt_off0000f6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C8 19384 bytes
SHA-256: 0b582ef4aaeed000bb38c3ef2e1ce93627c41792ed35dd8cbfc78d580c12c645

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