Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabddcb26cdbbde8…

MALICIOUS

PDF

87.4 KB Created: 2021-07-06 08:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 143c0bd58ea54d09a6f715b60ebabb1b SHA-1: 29b337bb8c8a823b5e686a2d9e96e57b717853c7 SHA-256: dabddcb26cdbbde865aebe7c81cf95df71df1e3b9a27c3501baf40ad4091f9f1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external links, many pointing to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript and link farm suggest an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://aviatroglo.fr/IMG/file/robegikijutoxaruw.pdf In PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/20f17685e1c82b5d96c24108288b2d0e/60601420376.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087f407b8058---79588520810.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/uk7qigshr585r7qjeoos6qkd4j/93522064794.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/munidejanipin.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/bofasutilipukavegu.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/78554565907.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/1573702608.pdfIn PDF document text
    • http://haus-st-otmar.ch/userfiles/files/gibiti.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ef10ea971---40934055994.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/fugazaletoxogudix.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/dbcbd1e3755a621dee6dd4c6f4f111d5/pomudupogogozutu.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/a4af6a6821bac5f060e9f6793a0e1e17/mupirameguxufafonokomalib.pdfIn PDF document text
    • http://abc-tel.ru/data/File/kuzizijutodagozikus.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607acb6a03cef---13331881670.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/b7510034a2e386f9a32d9c14ccbd0fa9/xesadidivobilozone.pdfIn PDF document text
    • http://vtaky.sk/media/file/piwasuzolapegukenusanilo.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/92467492348.pdfIn PDF document text
    • http://cloverdiamond.com/file/wasobesikuxatapunes.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/teduxuxadu.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/c21c11d17adf4cabb9b0115c42092d2d/82896516776.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=tim+mcgraw+singing+humble+and+kindPDF 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_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 10980 bytes
SHA-256: ebf110495595444e4e91a315c308136ada3b04513c06812df6e04ece38146c3e
font_01_sfnt_off00010703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10703 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F15 19376 bytes
SHA-256: 7ea334551bb05fc304287582d777d2f54a6f19a8d8af01222b0b6a6990348215

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