Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9d86a964e5f24b…

MALICIOUS

PDF

84.4 KB Created: 2021-09-05 01:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6cdd2d4f245eef2f034b13490719a324 SHA-1: 544f37c46d2b745eb30909b09883ca6e7427a2e4 SHA-256: dd9d86a964e5f24b7a2e5f36233c1452fa90af7fd0068c8689e663a96563632b
216 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious. It employs a lure to trick users into enabling content, likely to download a second-stage payload from one of the numerous embedded URLs. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may also instruct the user on how to handle a password-protected archive, a common tactic to evade gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://oniceh.ru/uplcv?utm_term=hide+unhide+worksheets+in+excel+vba PDF link annotation
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4feb90dee2---38565484246.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/84815837354.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021052821131456.pdfIn PDF document text
    • http://abworder.com/uploads/files/lezote.pdfIn PDF document text
    • https://twfern.org/upload/ckfinder_temp/files/20210626114341.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/nuvamivediwowagotaku.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073ecd673c57---tolokavudaxededam.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/ba6f9af4dd9e42b90db48bf1b586f43f/vuxekamazubokuvudewise.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccc642f146---50828509563.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071865838bd1---lakutijoselal.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/jqp4advg97q03fo0b1f9v9nujf/79792059457.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/79486148958.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/zubegofowuw.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/13767873352.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/044d0d8e098cb5f1e9c2a33b789a29c5/40220605748.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dd7e0d9ec52---92554019646.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/65347281788.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/sajawujixu.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/89724156728.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/b551eecb63f3803655d664ec1d77af16/51624483427.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/lasowixiwaxevefetu.pdfIn PDF document text
    • http://zjgjqmr.com/v15/Upload/file/202181616668814.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609fed562aa62---48644900855.pdfIn PDF document text
    • http://web68s.com/upload/files/bugasuxofete.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_off0000e4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A1 17576 bytes
SHA-256: 77bf8cbe437e6c6af2c47b84859c40373c5ec8c0d46d338f58323c20410a1bfb
font_01_sfnt_off00011240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11240 11044 bytes
SHA-256: 8b9eaeee3db2e200a7e0265698c3d1017987bcdd971665069f3ae1ed9187c618
font_02_sfnt_off00012bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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