Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2fa894c53b78c6…

MALICIOUS

PDF

88.6 KB Created: 2021-08-13 16:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d1ddb63979c211cea78e47f1047d89d3 SHA-1: 3410f96e6567c21bc2969e1b3c5b280776a23267 SHA-256: ab2fa894c53b78c6dfd8907f2c7ba55d8d0374d6eda369edd1ac67346cd3f99f
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a link farm pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV also identified it as a phishing trojan. The document's purpose appears to be directing users to malicious sites through a collection of links, likely for phishing or malware delivery.

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://93564497.com/userfiles/73840377893.pdf In PDF document text
    • https://labelmarket.pl/data/file/mefilawakiboribozikofod.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/s25ivbu80bnj86ei19gj35s616/lobotawakeridujatuge.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608ace0eed35d---21367318249.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/98751c1bbcd960d2c007bc78cd8d28d6/zugeterovaw.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/ee8291a8cdfdf82fa344eabf7ca7b210/rubobivedokogubimela.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/67232843688.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/vkrajimilg3odcgghjaag3p9na/siwajenaxoni.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f4d2cdfbe---94078401014.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/24319005166.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/sjpl5d511pq8sp0a9hquh5s92t/witugodonegetovepereja.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160b31ebd16101---wipuliw.pdfIn PDF document text
    • http://byecook.com/ckupload/files/rudijibewukasotutuse.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/46030242492.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/lifevamegagelopirifa.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/fefuvojaxazeg.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c6e421ac1---diwalerojasarof.pdfIn PDF document text
    • http://www.smartlandgroup.com//ckfinder/userfiles/files/99860799845.pdfIn PDF document text
    • http://italiancousins.net/clients/5/54/54f3d33123424807706abe9154268524/File/nemowegeraw.pdfIn PDF document text
    • http://webatnet.de/ckfinder/userfiles/files/mewuz.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/baxujavabevorug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=is+there+a+skyblock+seed+for+minecraft+xboxPDF 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_off0000f6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B3 11140 bytes
SHA-256: 2a66109ae288a7dbc1381947519b4383a3ef0eaac7ab4fee30cda01eff4b2689
font_01_sfnt_off00011093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11093 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A5 16736 bytes
SHA-256: 62f5e57053a1b94ddc7f2bee302849a9dd98cae1f8ba1f20431551e49bfe2b22

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