Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bf31b5b47289c4e…

MALICIOUS

PDF

70.7 KB Created: 2021-08-14 17:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 551e4c8e42cd2b6ac664bdf13b5e476b SHA-1: a89cfeda7e0ec34947695804fd07da5f5c01b3ab SHA-256: 0bf31b5b47289c4e059a7bba59b8e94d91198e5a21c3702aad32537b696eb096
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9791

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fb3894641---96279602761.pdf In PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b47c12383e0---56140558398.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/ef2f939d0cb80c06f3d3980d20aa53d5/72492963352.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/74232983095.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/8i9uphmh9qr8djek98b89v8mko/28391094246.pdfIn PDF document text
    • http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/22502875470.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/3s22re908uipdkqseap0r403ht/68933858334.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2b504d122---fofinaxeginolujivufiki.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/18b8983fc01dbe65d80253aca4ffe39c/85445068066.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/niwovavipowurobemozal.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/91465880153.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/gezikumow.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/d2e538a72d9bedbe4dc1a820ca951459/25302055016.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/50365946975.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a535fbd7426---6924867750.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/tadisoguj.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/juruxaxibegujupuku.pdfIn PDF document text
    • http://stromzeleny.cz/file/27841055591.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/69b19f85cd09e402effc99294509487f/watimes.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/99974166017.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/27087660874.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=what+is+the+independent+variable+in+the+following+hypothesisPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/d4855ab2bc44aa9638e3d6ebc91aa867/27224709560.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001055b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055B 11176 bytes
SHA-256: c0670f4184ebac7c42de86eda977d100ee1c89491caf044148341526b8f9312c

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