Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb01b044576b450…

MALICIOUS

PDF

84.6 KB Created: 2021-09-11 04:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 799ee27aa96cab2ae8a833fb7659d056 SHA-1: 470f3fdc68851c4da8965fd9df4739746681f386 SHA-256: 2bb01b044576b450d878c91b364c6609c74442dfa16ae073587f5b661b2c6670
216 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a phishing or credential harvesting attempt. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document explicitly requests sensitive recovery information, such as private keys or backup codes. This, combined with the ML classifier and ClamAV detection, strongly points to a phishing campaign designed to steal user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=download+photoshop+for+mac+full+crack PDF link annotation
    • http://thailaundry.com/imgUpload/files/jojigufaradov.pdfIn PDF document text
    • https://gilbertems.com/videos/file/2231300816.pdfIn PDF document text
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/30379896165.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/tolufesuwipe.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/djib31f7cd84jbo843igp9a4u7/wovufakebuna.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613468fb46105---jekowidepudimuba.pdfIn PDF document text
    • https://www.tristar-technology.com/ckfinder/userfiles/files/rerasub.pdfIn PDF document text
    • http://szwygs.com/upload/rifalu.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/64276742153.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/mudaputesus.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/63886441877.pdfIn PDF document text
    • https://esperidiaogomes.com/userfiles/files/birovorabobon.pdfIn PDF document text
    • http://keemunblacktea.cn/uploads/file/040056379567.pdfIn PDF document text
    • https://zzwgjx.com/d/files/69144000086.pdfIn PDF document text
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/tugowebofimopupudoduzogu.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/fck5s8kt93fso1vqmmgmf4590t/wugir.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/verajupetarari.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/17456763593.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/zukido.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/87847261276.pdfIn PDF document text
    • https://hotelgaric.com/upload/datoteke/betodetubejilewov.pdfIn PDF document text
    • http://ip-malkov.ru/uploads/files/34301074914.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_off0000e4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B4 10940 bytes
SHA-256: 2581b66d91bc4426c8e568ee53bd63a71cb62109c53e74a6434da47977e9346b
font_01_sfnt_off0000fdf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF4 17908 bytes
SHA-256: eea5a7811c969190188f48b6c6ebfb61f828a7786f1d5e7128134959135a24d9
font_02_sfnt_off00012c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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