Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d38cf1477e8d9e…

MALICIOUS

PDF

81.1 KB Created: 2021-09-18 08:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f1b0a45703b591741cfacbefc0189d03 SHA-1: 11d1b5cfda7c6102de3c558ecb8f4e1571c0a9d8 SHA-256: 78d38cf1477e8d9e0bfcb9d494bdaf6481cb64431696f1a618ddc057529143b5
156 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous URLs pointing to compromised WordPress sites, likely intended to lure users into downloading malicious files or visiting phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, with the document being identified as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ef8829db9---44510864672.pdf In PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c345f1fba---15773664593.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/42656570409.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/tadivuse.pdfIn PDF document text
    • https://go2germany.ru/files/file/gavimugapujimiwotuvobuv.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/woxivorobapoga.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/f58cbaa716217304c30f417e05c4091a/fowup.pdfIn PDF document text
    • https://sibois.eu/userfiles/file/kuvuvodo.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/wesudoxurafawut.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613000c8196a1---83209230768.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/sabuxa.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/rolabusibenekufom.pdfIn PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/witetegebopuruvubo.pdfIn PDF document text
    • https://clubon.top/uploads/files/53043960106.pdfIn PDF document text
    • http://sbsedupatti.com/sbsedupatti/userfiles/file/pomurowawotobotunisosoj.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/40850103385.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142710cab8e0---59764396560.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/xafujafadaravazazebe.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142106f92df8---62912186720.pdfIn PDF document text
    • http://katela.net/userData/board/file/67203272471.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/38631531038.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/mikiduvibodoto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=play+store+app+download+for+windows+7+ultimatePDF 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_off0000d885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD885 17060 bytes
SHA-256: b1fdd4416a64c2c378a762b688b0b1bf98caf1fbe91fa86f267bf0db50de0330
font_01_sfnt_off000104b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B6 11012 bytes
SHA-256: 8347366213189d6ca6b1a94cacd758e9ecb579129be8702b3160797babb628d6
font_02_sfnt_off00011e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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