Malicious PDF — malware analysis report

Static analysis result for SHA-256 29029f4a11941fab…

MALICIOUS

PDF

87.3 KB Created: 2021-09-01 03:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6a35a058ef291c2f1aa61b0c62d2b76e SHA-1: eb6a6e3cb2f56cb1fc01dbaea0ac0faa862adc6e SHA-256: 29029f4a11941fabce27a05061e42e666bf1ce61161d3b48f3c1252f26f55bfa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect the user to phishing or malware-hosting sites. The embedded JavaScript is a common technique for initiating malicious actions within a PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://medvor.ru/uplcv?utm_term=how+to+take+professional+photos+on+iphone PDF link annotation
    • https://takipcisec.com/calisma2/files/uploads/72806141029.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210823223331.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/74797191544.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa83ba16c9a---38082958164.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/58602235626.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/68962388656.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2760f04ea0---bokubojegokexi.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/pajesusuluvusugebevebone.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eddb63134b6---5027966007.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/82976363972.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb73b54a50---67016199747.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d507e07f51---jaxosozijobulaxusomifu.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/66830140640.pdfIn PDF document text
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/6597435006.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/795opqcajv8ca1j2rdeu4qlnk2/82980224636.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/39634556595.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/3f99ce7f388b11017b9a9f4206f0344c/75203010809.pdfIn PDF document text
    • http://sun-tes.ru/files/file/gidejo.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/g40ahi1ea052do1cb3uv1697g8/57393238680.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/34106822806.pdfIn PDF document text
    • https://agermag.ro/mm/file/zumakorapikapoliwepabex.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607505b2bd707---23617902989.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/55385912314.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_off0000ee83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE83 18420 bytes
SHA-256: e1b27d46d936d07178fca4bd05f8893421ed834c1a4dbb03ead5a3c44f930741
font_01_sfnt_off00011e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001361c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1361C 10624 bytes
SHA-256: b2293736ef6e13a53abb97f4c299086e79afdd8e25cbdff52c96c481ba3b6cb7

Open this report in the interactive analyzer, or submit your own file for analysis.