Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eba52ee791a8eab…

MALICIOUS

PDF

74.2 KB Created: 2021-09-02 15:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 33b6a9ef4365c49d966431941a5c157e SHA-1: 0ba55f83e611a24b7352baae5dc713afdbfa4d57 SHA-256: 5eba52ee791a8eabd278c538322db21d578bcb8ce3d28a2d2f19b32d36938444
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 websites, likely to facilitate phishing attacks or distribute further malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests these links are hosted on disposable domains, a common tactic for evading detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://philabc.ru/uplcv?utm_term=convertir+jpg+a+pdf+i+love PDF link annotation
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076260b39d4a---rozurinukel.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/a9899c7e8295546333c08654b4f02835/povewomifejumijeku.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/7430014387.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160a274bbbfe59---fuzowu.pdfIn PDF document text
    • http://yongqingtech.com/d/files/62068566703.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/favolojomeba.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210722201927_cjw234.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021061001425899.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f0de231da---ralulilalelonoru.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/d0b80d13ae03041f539493926f9802b8/juxazofexapotogade.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d3e315ae9de---72518873701.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/gofaxuz.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/kawawetoras.pdfIn PDF document text
    • http://imaginove.eu/data/Files/781185089.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/14318257407.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/09/202109020451415893.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/94adb5e53d41ddb8aca304bbd01c8782/tujituwabasekubemunaw.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d40d4e0a831---53816163603.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607924f787cbe---xosavel.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/sesugeridopokarap.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/81087431612.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210705132147.pdfIn PDF document text
    • http://perfecturology.cafe24.com/upload/editor/imagefile/nedolefidexi.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_off0000be3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE3B 17184 bytes
SHA-256: 7be86ee46ff51bca12ece19f7c18fa4cdb43c30d5f3eae5fffbb97db0a64d6ee
font_01_sfnt_off0000ead2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E9 10732 bytes
SHA-256: 764d57ce53fda5058e070c5a142491e746863ec30c9713f16d6763051cc775fa

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