Malicious PDF — malware analysis report

Static analysis result for SHA-256 50527a0100de5b0a…

MALICIOUS

PDF

205.2 KB Created: 2021-07-01 12:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b009eae75f31b0ce70ff1a1a8aafd79 SHA-1: f30f828fefedae9c0607c1c9931fd5aea4ad59c5 SHA-256: 50527a0100de5b0aebbfd1eb1c718d7aef208a0e6bb482116475e4a9286b6179
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with malware delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9739

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.
  • 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://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607954bc85e3b---10018334340.pdf
    • http://daebokjungdb.com/uploads/files/wiwiburelazujideno.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607024a72e559---retilukefovifelewuwukev.pdf
    • https://fablab808.com/nbloom/fckuploads/file/35284651408.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7ba89bf56---63210175116.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6a227a786---49758703734.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/afjhomiphndk87jdna1g44vht4/vajez.pdf
    • http://mytmbc.org/fckimage/file/zepofotuwopikolid.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4003ad6c6---berovegevajutusafimixip.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccc6cb9756---povaxuror.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/mtsqk1cvmk4qj5j0cdvlv2c1v3/36265852873.pdf
    • https://stehovani-ostrava.cz/static_pages_files/file/xekusodewevezi.pdf
    • http://pileshoppen.dk/userfiles/file/7620488638.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/30e88bb1d366421913d1fd7fa64aa180/32643105858.pdf
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/jozutagutuzagarupute.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/e5ead347afb3605d4b782521d9a0d11b/futoniv.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d00207256b---jubenasinidariwolozada.pdf
    • https://berbagiangka.com/contents//files/74020979435.pdf
    • http://alarcon-v.com/editor_upload_image/file/xavuta.pdf
    • http://qtjdb.com/UploadFile/2021/06/24/file/20210624_051733_123.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/sj411rq54h1cvgv3vhtaj26l26/tolire.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/f3ek6chpqtemllri4svpaftnf3/56161274278.pdf
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/norejaduronolusenufoputap.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/036n6rrmt4v1f2npdmc8g62eno/65221506731.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=penn+foster+college+exam+answers
    • 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_off0002c980.bin
e6394ab901cc0ad42593f3a7b2d3aae3216e31592d71a02364120c960a1c9386		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C980 10776 bytes
font_01_sfnt_off0002e27c.bin
b4525038dfa837a1915fcb19967842efd4b8344337887a741cfd35fc4f186503		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E27C 16784 bytes
font_02_sfnt_off00030e57.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30E57 16792 bytes

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