Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d69e99760f717cc…

MALICIOUS

PDF

92.5 KB Created: 2021-07-01 15:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9886fc22eac0c90a4f59f634847e4c25 SHA-1: 4f069eb90fbc5c1bbd52e0c1a443e6b0a9bcba6d SHA-256: 6d69e99760f717cc471279be4f4d8c85a5cb7bfdad90ec515341bf97d31fbe9c
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm with numerous URLs pointing to compromised WordPress upload directories, suggesting an attempt to leverage these sites for hosting malicious content or for SEO spam. The presence of external URIs and compromised CMS upload links strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://infrive.ru/uplcv?utm_term=mount+rushmore+is+located+in+which+country
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c668a6271---jegigidibuvebejukamewo.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9cd630d36---38863032401.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2e204bbbf---janufurag.pdf
    • https://aduanaldelvalle.com/userfiles/file/5150893848.pdf
    • https://zemiigori.com/uploads/file/kivuvadepazowovuboweja.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076eb3f683f3---141684546.pdf
    • http://bright-mineral.com/uploadfile/file/2021061721481812.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/cl65rf4pnhha53am92d2vpasce/53636223641.pdf
    • http://akinmedikal.com/uploads/file/gopivuziwukolone.pdf
    • https://alakharia.com/public_html/userfiles/file/43847326501.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094be1ad7cc2---gozugameminulepuj.pdf
    • https://fenixfalt.com/userfiles/file/30351187633.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cf777ded290---xigatizezive.pdf
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/ertnebum7riiqlc7g9s2u99s9b/nigitimisofimeduxijedat.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/v8c2gj3km0nlpek5nkbtb8qon9/88584425057.pdf
    • http://lhdrum.com/User_File/UpFile/file/20210628061546_MTQ3Mzk0NzUwOA==.pdf
    • https://floraplant.gr/FCKeditor/userimages/file/pezoke.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/68962f518fe3a55c1ab2e408c1940b34/89797086708.pdf
    • https://m-isc.com/userfiles/file/91905003293.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/0a2bc20be53e63cad60f0c8419c2bbbc/4030817964.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16094cb4a53c58---75230859993.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c876e0a4392---bowolosilolutemufozar.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1b082ffc9---20000543056.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe49f63cb9---74409474772.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf726e7c6c---vaxokoj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001045a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 16792 bytes
font_01_sfnt_off00011c71.bin
b161c0f5e4fcf16155eb226283180ccfcca728d24ebb0b4e45d74122e552e418		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C71 10928 bytes
font_02_sfnt_off000135a6.bin
9e4f1bb4cbaf6fe7be50e793908817ce79b4d9ddb4af790e7d35363d808c5423		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135A6 17848 bytes

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