Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0fe151bfee026e…

MALICIOUS

PDF

87.7 KB Created: 2021-07-01 12:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5c6a680e39e4b521e85b99feceac8a87 SHA-1: b6da65b6ddb508a7d507f8766bfb245298f92de3 SHA-256: 2d0fe151bfee026ebe48f268af686af6a5004598916f3442cd84f56215aaf19e
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF functions as a link farm, with numerous external URIs pointing to potentially compromised CMS upload directories. These links likely serve as a lure to redirect users to malicious sites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://sofanet.ro/ckfinder/userfiles/files/regisuzudaxakozo.pdf In PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2e6b2da56---rawebenobepewedizi.pdfIn PDF document text
    • http://pritchardreunion.com/clients/81409/File/zavidewulilitulosixumev.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d0e950d4a---12336620940.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/29916925716.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b109857c48e---nazopomepifonenekur.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/ij2s6gfkhb0616o9cp7u7rgf2f/vazuxizeloxamuvezijuj.pdfIn PDF document text
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/27237078676.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/3f5i16upkbnm0qm22vc4v488a1/rozadamojuju.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210701_FD9F568B53505001.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/n4jbs4cublm74beg6hs18cpsgu/jetejiwedaxegewasufunixor.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/45bab0a02806c124d6124544c418ef02/sudaxokeniriv.pdfIn PDF document text
    • http://minniemleefamilyreunion.com/clients/4/46/4626b253669c69ed517e077132fb6553/File/91627767212.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a39b810603---begujalumele.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40b12766a9---69434426541.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/22327568469.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/piwarobogi.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e4450d2d5f0552f4596b7ef8f030bed0/sekumana.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1eab6e00a---15828116105.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/61223f3948ce99cf865ca2e31d82ae20/wiwetunekek.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/8c3eh1223ag1kf4vav8qjh4vbc/tebapinedujuximeroj.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/299512b29070d4eb13a948053d9f3310/92129341080.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/jqjjo95dfco0ojbdnuheh3ovis/22890572123.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=allocation+meaning+in+punjabiPDF 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_off0000f345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF345 10800 bytes
SHA-256: 60843a80f3206ddae2efd65e355469588f500355b81c79e535761d47d2d53b39
font_01_sfnt_off00010bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDE 17600 bytes
SHA-256: 1c5a3912434102ca85153f6b367ac7a65e8f4508a207d14c32aca86e0881724c
font_02_sfnt_off000139b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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