Malicious PDF — malware analysis report

Static analysis result for SHA-256 369e6418258b26f4…

MALICIOUS

PDF

70.6 KB Created: 2021-09-04 04:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d2c247c247836c61a70306adaaf035a2 SHA-1: 4649fd02f205c6c8cbe683c9f46288a0b9738ed5 SHA-256: 369e6418258b26f493cd1e79b021826df5f87037fc2a6c331a778a32b1fd8272
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The heuristic firings indicate this PDF is part of a link farm designed to distribute malware or phish for information. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • 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
  • 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://timapools.com/uploads/files/sivixazu.pdf In PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70239089868.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/af40bf0408e300a6226fdbf84bf10b2a/nasenuwugijavuwakeju.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8b0b82aaed83f1ab581a51550ee10767/saguzivawaxuwubejevorosaf.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/rizotibegirepodepel.pdfIn PDF document text
    • http://sintjorisparochie.nl/userfiles/file/54268306800.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/8ceb968be6be47c2055886da47475a3f/dolarugepiporonir.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/47322514303.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/pixogonaxaxavota.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/beb62533a868cd6f7ecd35b7912f04bd/87095516762.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/mubakidexab.pdfIn PDF document text
    • https://basisangka.com/contents//files/nimigajivijixupuk.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/13264996698.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb5777c324---nepunixiburuxekipoz.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/369fc4851ef7ea29ab6881c13046bec2/88911356861.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/73c872fbc23ecc88996f7336bb04bf24/zotamuraraguretaza.pdfIn PDF document text
    • http://imi.vc/upload/files/5924627261.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/202153234193107.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/topofobidakepapulemovom.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202108240043536323.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/0359bab318563f003255223ace3f5bf2/98652110562.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/35159889932.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/mokirivaropukupaj.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/vedereduvuperasabogisix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=printable+worksheet+for+4+year+oldsPDF 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_off0000b626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB626 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3D 10964 bytes
SHA-256: ffc9270639dc5bbdc50798e760070c3e3bdca67c5c88e31687e2700618a0c34d
font_02_sfnt_off0000e7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B5 14724 bytes
SHA-256: f349e45103ee6cb9e8613eb4560b7cda1eb0a53e32f9f93ce334c4fec3cc935a

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