Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbad80ea4426780…

MALICIOUS

PDF

79.8 KB Created: 2021-09-06 05:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 725c91e045924f356bad3933fbe25a6e SHA-1: 6f55291b1deca54023f1145d7a5e9f6277acff9a SHA-256: 5bbad80ea4426780a7a84f1266fb25df523d30dab45a084a952bc8e7bce694b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit users through deceptive links, likely for phishing or malware distribution.

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://ccsl.asia/files/19253273703.pdf In PDF document text
    • https://digireg.cn/upload/81891021340.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/15451482095.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/69079280455.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/22603701292.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/pukoruxavibagef.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/6494961671.pdfIn PDF document text
    • http://hodori247.com/uploads/files/bifagigigowine.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16072c816be26c---kaxetenideripat.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/nanugopefeb.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac41bfb4708---nafamoxe.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/sonorutekirolilexa.pdfIn PDF document text
    • http://zlato-invest.cz/upload/files/17050665142.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/f1b30558db85e547d4b460ab85f6ddd5/29155545138.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/e5a71282da7dd3eb36979734f07f0360/58765544945.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/bejowituvelamonukob.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/38567534098.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092404a8b836---voxugejezogopipagopupaze.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/28ff0c640b3099b89cb5c418578f498d/61806482356.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/dovaposarekor.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/89e2b5dab0117f22e130ae15ceaa18c0/saguji.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/92575299288.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=wps+pdf+to+word+converter+crack+free+downloadPDF 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_off0000d285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD285 10760 bytes
SHA-256: d6d335a5ce66507237633221772f85a4a9f652a022aa20f9fb095e0404a386a7
font_01_sfnt_off0000eb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB82 17492 bytes
SHA-256: 141f5b5ef23b412c6ea49935fa7341cca81dd22f93ece2cbae2e081fc423fb8e
font_02_sfnt_off000118f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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