Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e42d398ad66038…

MALICIOUS

PDF

62.3 KB Created: 2021-09-20 13:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2df24d1089db9a6bc80e4f54f292411c SHA-1: 1017054d5bfbed8c592aeb16656849787d9afade SHA-256: 45e42d398ad66038f606c95f6dab6a9cafbddc082ca56b60707db0f883f1b0a2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9122

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oniceh.ru/uplcv?utm_term=preliminary+finals+afl PDF link annotation
    • http://feynburg-uhren.de/uploads/19140382491.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/80170117068.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/43362178757.pdfIn PDF document text
    • http://erpos.sk/data/files/popafesunaxepirozuwir.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/gatirakeriwaxuziseke.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///ramemapilanabobumumo.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/f3796a156153191af3fde17a244f94d2/wotaxidaru.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/161353b0629005---purizapaba.pdfIn PDF document text
    • http://innotack.com/userfiles/files/negivasatedijo.pdfIn PDF document text
    • https://kimcert.org/E/file/duzapukatukijuvavexat.pdfIn PDF document text
    • http://wwsm-hk.com/files/file/73177359994.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/minafewatodu.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/48366676454.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/17946341299.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143d194a694c---zudazadoxofubebap.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/60288517884.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/zoxozoxibozubumipukixaxid.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/gogupixodiroxumuk.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/48672705601.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/mifogimezak.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/40355805281.pdfIn PDF document text
    • https://tivirtual.com/userfiles/file/27484366125.pdfIn PDF document text
    • http://jooli.ru/ckfinder/userfiles/files/89295291051.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/40889173590.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_off0000dea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA9 10272 bytes
SHA-256: bff145b0f259a4b6f7dc339cf23a12787da2bdb35dc99494780cae56cb1febf2

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