Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb75a2326777b633…

MALICIOUS

PDF

85.6 KB Created: 2021-07-15 12:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0678d4a90f4bd152c87a9ac8d5cac65a SHA-1: b0865b057bcd0cd15467fd4cf9013c748ed9b246 SHA-256: bb75a2326777b633100034dd229360b72bd2754c29e59f98233fede0dce63612
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm pointing to multiple disposable hosting sites, likely intended to trick users into downloading malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://inwebjor.ru/uplcv?utm_term=free+gta+5+apk+android+apk+download+for+android PDF link annotation
    • http://berrybucs1973.com/clients/3/3a/3a2d6910be1067feaf6dc79f90d505e0/File/pivozojexawikunokomikur.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160795080a120b---64311983337.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160df85e3a8419---37384524524.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b287339b1ca---34733735245.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/65524393337.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/kkiqr09pa0rme8j6he058buah4/62939043853.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba8f8b72aa---42712344442.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/32877b7b902878c3c6e1c19758d7b4ce/88464226027.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/57751264997.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f02e3646b---nerovegaminopawotijananom.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/6234180011.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/36829933658.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63657dc896---31806244323.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/geduwoxafomusajowagi.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/997480744.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/3d129304a3a6505df20e6dbf6064fb42/41472845634.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863efe35774---2615719886.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e335cca7c---gisifisixojis.pdfIn PDF document text
    • http://from.ua/upload/articles/2021/06/21/files/faniro.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/wabuvinujujovolotobugab.pdfIn PDF document text
    • http://dakmet.pl/upload/joxaxugojubexomejakob.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/fupomotifulowolani.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/zowutugugu.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/93291944021.pdfIn PDF document text
    • http://eraldocomo.it/userfiles/files/boxokexesonunubugusiduv.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_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 10796 bytes
SHA-256: 4733254c9dd9653dc68717110caaced3ad55a0b59e4e839c0bf870c5900b3582
font_01_sfnt_off000102ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC0 17884 bytes
SHA-256: ee362b7a6295574b61dee09d9b17ea684a6aeb9f138ac023d5006375b5d15232

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