Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab0538fd04c9e34…

MALICIOUS

PDF

84.2 KB Created: 2021-06-28 14:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 107c3d48f7e9625caac5db945901f7f7 SHA-1: 0d1c7c7ffa9d3b7b2765de026dd3aecb5c1c10db SHA-256: 9ab0538fd04c9e34144662cf457a99ec291fcd6f07292935fa2457d3aac7b613
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. The 'SE_CLICKFIX' heuristic indicates it employs social engineering to trick users into running commands, likely to download and execute a secondary payload. Multiple URLs were extracted, some pointing to compromised WordPress sites, suggesting a link farm used for hosting or distributing malicious content.

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160775c4745f64---38815511570.pdf In PDF document text
    • https://arch.ua/ckfinder/userfiles/files/rorovube.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/55744885981.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/30oq8vv9m77su99soi77g8ig69/79022266258.pdfIn PDF document text
    • http://indecomavo.pl/inc/91283277330.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084bda7e245e---todurukabakunur.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607421228731b---47006714335.pdfIn PDF document text
    • http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/93816268657.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/50a766bc8c5d9e2c614b6959995cb3df/27853471066.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0254305f0---botoxigotizuviram.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/morunosonokazetadibi.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/vivixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=i+reset+my+pc+and+it+keeps+restartingPDF 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_off0000e662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE662 17156 bytes
SHA-256: 255093cf4d2ba81f8c3a376638fc408a2e23c3999247c501ea46a9aebe077d7e
font_01_sfnt_off00011356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11356 10848 bytes
SHA-256: b5a15015a016cf8d65e58c70c1f17aea0d630d1a167d74fe7d69551bb72b5094
font_02_sfnt_off00012c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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