Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe74849ffbda1fd7…

MALICIOUS

PDF

86.1 KB Created: 2021-06-30 10:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 29ce17c855c845580ee54e2ecb6a36d9 SHA-1: 377309d26d1327d6f9ca37d84582c02f2537f7d9 SHA-256: fe74849ffbda1fd7ca2bd9ee96de1a314ad48095cde798d3de07f268da8d1f10
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://oniceh.ru/uplcv?utm_term=cat+hissing+during+play PDF link annotation
    • http://aiswaryamatrimonials.com/fck_uploads/file/dodifenuxefato.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/7g5ords8bo7uh4p3fqcrpueua5/79364013072.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be1b7c553fd---zodokujilajavivoxe.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/48660953501.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/kixubukutapen.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/kiwowubatololujixomowaji.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088323f8f0bb---44582064605.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/320r4v1m8944i1eutq8h4742h7/6097492957.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe43262252---boturepe.pdfIn PDF document text
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/4skgdqm1eqpogscl8vsjpp2oke/43564693981.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/38371812012.pdfIn PDF document text
    • http://poiskvod.ru/images/file/metazavegepolumubu.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/gitiwazix.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/3b1a873b68a6cc151e0bfaa66e39bf62/gatuvemufofuwep.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/vodinaremotefebimituwo.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/54103908934.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/623d10a0311e2ca8663606f961f0ea52/28890798203.pdfIn PDF document text
    • http://debden.org/userfiles/file/98262124620.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b9f8d3096---bosopatikipamexevap.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b635ed3dac5---81782410878.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b63320f035e---rojubugut.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f949e258a90c3ec8f9c5cddbb5f369df/57828790637.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bd298c5629a---mivijitavunutisonuxu.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/33745893668.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/jidawapimub.pdfIn PDF document text
    • 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_off0000ed4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4D 10664 bytes
SHA-256: da8e3d325f1a17258649291aaa63d252c28b6ae70a85ab48c043d7c585a84a32
font_01_sfnt_off00010576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10576 17644 bytes
SHA-256: 4d46b0738fae5d3e3448600ab73039cafd773cb82c71848d964d8076200ea327
font_02_sfnt_off00013334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13334 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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