Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f0cd212c20e929…

MALICIOUS

PDF

95.3 KB Created: 2021-06-26 21:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3b6e13cc27dede5e77540e50cb04d9b6 SHA-1: 67aac3cbab4b0b915f294802a35aec9d3485c2ca SHA-256: 60f0cd212c20e92946791390be85f9a0cb021d56162ab921cc4ae23dee58519a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites hosting other PDF files. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests these links are designed to attract traffic and potentially distribute further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • 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
  • 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://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/9de2f29acbf43669bf72481692fa0a56/mekusepefifagafixu.pdf In PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/669a60fd40fb79b29883a2c29bfe2ff1/lawawijet.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///20827639905.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/59841346079.pdfIn PDF document text
    • http://mousike.it/img_ins/files/nizadepivazukud.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/43320663922.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784304376d3---wipamodonavobazo.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb4876dbbe---82765733333.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210611_041CC960A1623C6F.pdfIn PDF document text
    • http://wenxuezj.com/images/File/batanoxuvud.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0446acd91c---fivajajesikawu.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/5v10e6b462cifdhj50shpu10ps/35840660692.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2edfaf3b7---97610859237.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099cc460ec7b---doduzavukedejasarala.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/nunutejiberifafa.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/jofepifavovozadifalewevuf.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/xorugatanim.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb55826f13---zunerajutidaniwemaf.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf297d7c99---32080721225.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c5337e51d---80235235714.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0a0018514---73515177611.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=among+us+hack+always+imposter+modPDF 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_off00010b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B61 18824 bytes
SHA-256: ddaa05d025cb4d89e017a94ee0fb3a8a7443c6709677f86f961e414d885013d2
font_01_sfnt_off00013c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C20 11336 bytes
SHA-256: 5db16c2b1b4a6931ebc759b9003d7d6c9ce314f80bb2f6b3f75fb8438e8d2ab7
font_02_sfnt_off00015688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15688 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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