Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c6a195f792aa4bc…

MALICIOUS

PDF

108.9 KB Created: 2021-09-08 06:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5241751e29cb8a0e1a38aa6dcf4df271 SHA-1: 4c465d99ca2ae07c3052af15df0b78b3f4354bdb SHA-256: 5c6a195f792aa4bcb8b67483e70faa65cd71ef0af8fbc816addb1a2dfc26e11a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating a potential for malicious scripting. Heuristics suggest it is part of a link farm hosted on compromised CMS uploads and disposable domains, likely intended to distribute further malicious content. The document also contains lures for clipboard command execution and password-protected archives, common tactics for evading security measures and tricking users into running payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 8

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://www.mmalappeenranta.com/tiedostot/files/xavavem.pdf In PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84064642154.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/th8usttmv8jfdqeco42vrb3onr/22386169992.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/gobomazofatap.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/91361582919.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/nijawunonenuzokotajunewa.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d2b4d99dcbf---17927936098.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/17824274118.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/4114519998.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/67554628785.pdfIn PDF document text
    • http://khocabien.com/uploads/files/dalogosojasaru.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/9369e6b2cdc30d54d2b9538e191cf27c/81553271428.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/kufaritipobukuneginuku.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/64611852632.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/67141946489.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///64904059118.pdfIn PDF document text
    • http://shihtzufurbabies.net/clients/d/d3/d383cf0c90cf2d2391705d5438694b4c/File/16097421899.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/13442703744.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/tobarazove.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///47159513100.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/89e687426eb7573c146c16097dcd4864/30020021300.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/40242161962.pdfIn PDF document text
    • http://kasargod.net/uploads/file/23206024923.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=baofeng+bf+888s+service+manualPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB9 16164 bytes
SHA-256: a0f26d9ec2bc0bbc84dfb8c1a224a49f7f70479ac92e21d726acd811d43f3bd1
font_02_sfnt_off0001505a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1505A 22776 bytes
SHA-256: ebe7e4bf0daff8f570759d84ad7819d9eebce3238d9c928c20ff84ddc063dcad
font_03_sfnt_off00018b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B33 11148 bytes
SHA-256: 7988086e5eac70a04cd070966ffb9d8d66b4f680ca96ae8831e8da5dcf1087af

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