Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb7895f7659bd19…

MALICIOUS

PDF

109.6 KB Created: 2021-08-07 03:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9c746de7e40c7e44b64bb9b9de2a1901 SHA-1: 6679a56f13ec17a5c7c2c92cff3732fb5776b202 SHA-256: 9fb7895f7659bd19193390c35886443feee3fb6c6a349b194fcb865d81e82e1f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is unreadable, but the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://equipociclistaugeraga.com/ciclistas/userfiles/file/gixupaloj.pdf In PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/nomekanugawovilun.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/78793337860.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d247e38b95e---46402592682.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/46495503076.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29d378b359---takufakakinagitudoligivi.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/kuvufaluzafufajotagufijo.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160891a03068d6---76178776510.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/52324452037.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/18613092465.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/kujozatirasamibuv.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085429c980a7---wexewonebakojabopogivun.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/26678836772.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/57255074406.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/nl5muhkdj8jhtr71r8ic249db6/pafezew.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606cb3a96e198---xupubiminalojizanep.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/25342518369.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/supexisenuji.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/960d50f2e0e81d7b041c6101d7447e5c/61469205039.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ff549c92---xavisizulagorozurixa.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/gudc8i3s89u984s60n2ofg5kl0/61702164013.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/2576910bf3626d272dc4817b63335deb/vurulevapivepimesomidaju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=best+science+book+for+12+year+old+boyPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14576 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D88 17880 bytes
SHA-256: 18ed010f244e51ce793ce24ed6a99eb92302713720194f05de738c03238f5312
font_02_sfnt_off00018bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BFA 11040 bytes
SHA-256: 8a25a8b35000e83a475ff717136322d14fc98967cd9267f7b2993fe77ac8db8f

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