Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb2ebc6e3f1de74…

MALICIOUS

PDF

101.5 KB Created: 2021-08-27 21:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 743b605572badb4bda6eedf809e2f8f0 SHA-1: 7dc21c2fbc1828c67c5b54d3d370532a79d1c3b1 SHA-256: 8eb2ebc6e3f1de746fae2b3ce4ffc1e080828e499553477b8cb58c6d3ac48661
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous compromised WordPress upload directories and disposable hosting sites, strongly indicating a phishing or malware distribution lure. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4588

Heuristics 5

  • 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
  • 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://garglob.ru/uplcv?utm_term=millipede+at+home PDF link annotation
    • https://fivetc.vn/uploads/files/jazoturoxenofiv.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16100db6d33aed---20984409847.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac7d1daeed---37225581702.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b46cbd6b649---74961284599.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/niganegomix.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/jodedurijazepapudiwazi.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/9a69b89f8f61cf6b5ee0d5bcf872a2d4/14168707394.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/vokolanu.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/33992477385.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/8f28d581f33b309c33ad4cb392f959f4/13818875648.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/k4bm8a3cfujc8pcjjcaa600mul/kowipijexupu.pdfIn PDF document text
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/zipupez.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/40009075983.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/wonovifunelejipamilazu.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/b4lsg0394f05evq11n04vl85pr/tigexiropu.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/fca9a3034b5930d8c23c938a8301f96e/daxabuki.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a74143ae2---subavukorewifavugegade.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/f2325e38787005a638d727a5ddada93f/fodesapove.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/96629318810.pdfIn PDF document text
    • https://mimpiindah88.com/contents//files/vumuzaxazuj.pdfIn PDF document text
    • https://www.thc.gda.pl/ckfinder/userfiles/files/23406593155.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001465e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1465E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E70 18160 bytes
SHA-256: 66666efaf0e89d3f772fcbe5b52c0edc9947afccff9cd3a2af8ca2071799ff88

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