Malicious PDF — malware analysis report

Static analysis result for SHA-256 29bbd84c92813de3…

MALICIOUS

PDF

94.1 KB Created: 2021-08-12 17:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ab2b49f174324033a1436dcdba203cf2 SHA-1: 1de7ac5df9ace3fef0500d028fe9b265c4c1a2d9 SHA-256: 29bbd84c92813de39b704ebf385308dba2663a751b0879c13d58d667a91d969b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities or social engineering to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://krisoc.ru/uplcv?utm_term=download+manga+domestic+na+kanojo+batch+pdf PDF link annotation
    • http://crackershrimp.com/file_media/file_image/file/28556210495.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/41875832632.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/6gj1cuq3of65qul0pm0e08c023/93115361523.pdfIn PDF document text
    • https://actorconseil.com/files/file/jedaxutomekonomivelini.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/6ktd59gtsmda5u3ditvdqg79im/gavim.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/56240372223.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a0f292af5---pozomozixinofox.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f676ea228d7---lolizusojarivizof.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/892e09f0ab2c1a436bd0c8c838901f56/77780622024.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///jeminuba.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/1418347421.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/xerozunida.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/39121646931.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e673ad75fb---lenowesunupajesur.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/205c3beb3b44f298844a5ea142200e98/sepimibefexurizebe.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/dojegufudew.pdfIn PDF document text
    • https://seerupit.dk/assens/file/bijire.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/gtebc23eooqjfvmjt3dmd67e8b/litewasakozuzigunikiloja.pdfIn PDF document text
    • http://servmed.net/userfiles/file/gorevojurikilemumadus.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/cf3e601b3cabf1946e7ae4a3070b82b1/16276940980.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/ce42a5ee795beea98148fa277b724452/kusudedowapafegevalowop.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/vabuzukoxotimugu.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/gdhvhec6lchm7sjaqfk0scdtmp/52896425721.pdfIn PDF document text
    • http://yeditepegumruk.com/userfiles/701347266.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66C 11416 bytes
SHA-256: b71380857e787c01c67e0f04b68aa65448b9a452a7cf5e129ac5b9a8216f2378
font_01_sfnt_off000100bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BD 16172 bytes
SHA-256: 157606249a7270ad452283484c3f65c5e7c66bf8bae99767c392d7674f0c62ea
font_02_sfnt_off00011659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11659 17448 bytes
SHA-256: cfbb46f5f04d4318d88b79f29dc26dc6291d2c8276fb6a22ab10d541b4f864c7
font_03_sfnt_off00014430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14430 2816 bytes
SHA-256: 3ac6769d84fb8bcb51639058d494de99f67dbe3201b4b37189ac8e91dd87e2a5
font_04_sfnt_off00015023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15023 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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