Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d90021893108485…

MALICIOUS

PDF

72.1 KB Created: 2021-08-09 03:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8c0cfdd5f0c4f4f11a9d9fb2e5a8659f SHA-1: 3c3bf6d90c16b40c9c848be7a83b9b8a0b6aa1b5 SHA-256: 1d900218931084856eb12d387bfb7a3a547c623ad7c96aa34e39ec5d58465cc9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to lure users into downloading further malware or engaging in phishing activities. The presence of external URI links and the overall structure strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://garglob.ru/uplcv?utm_term=zara+zara+bahekta+hai+female+version+song+download+raagsong PDF link annotation
    • https://associazionedynamica.it/uploads/file/fovixefu.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/t1futo12olhgot5lachrg8brtl/78913444676.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16100e0447650a---lawuxojofapo.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/85839828149.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/duwevonedaromuvejuzit.pdfIn PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/30168237263.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812c54314f7---xaxerelorogukoxiv.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f1d80dda8---13924769066.pdfIn PDF document text
    • https://norservis.cz/files/files/69227530030.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/fabeduzusomuxikodetawi.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/fbe882a2f8eb53480d7e57bccba79758/simeguvamuvumivobogapuf.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/68750446781.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/74dd94f0dd19110ee1cc69a76546ef8d/48385977563.pdfIn PDF document text
    • http://pasted-radio.de/web/files/bojiwerujofamaf.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e69f22646e---35517513908.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/8fa3e7ec8887529f712c56f200313436/xewezikazukuxobum.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/mavisatedageguvita.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/71684159477.pdfIn PDF document text
    • http://manajrgvaaradhi.com/cms-uploads/files/sapidamaremi.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-25/20210525185120283619.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927e78a9741---vabuvawisibirokozagedibuv.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_off0000b749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB749 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF60 11208 bytes
SHA-256: 5f2a376a7f6d246ac3c1c5c4824d97a17bcd52447199dccdbc185c3647375868
font_02_sfnt_off0000e951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE951 15988 bytes
SHA-256: 94a6f7d01388a8be49a85502ffb132e925b6c3284aa692ffdec53c20dc837547

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