Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d4de896ba8c815b…

MALICIOUS

PDF

95.1 KB Created: 2021-07-07 20:19:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2fbf68018713200fcfd162122e6d2fcf SHA-1: ddf97b2a54cb0ff495e3272384d007e64781a646 SHA-256: 2d4de896ba8c815b5ac919468cb4eb9cf45dc7d2f66a5602de850e67d78af1bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous external URLs were extracted, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the attack pattern of directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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=legacy+of+discord+hack PDF link annotation
    • https://alshaabcoop.com/userfiles/file/dipazevevebaped.pdfIn PDF document text
    • http://4bx.pl/public/file/96544243155.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/dopasamedami.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d8a33143e---kuxerenegevijewazuxab.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210608_8087E89A24EB7B11.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tadijime.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/9581167745.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021061214384770554.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b89b7684980---30386393870.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9lm90qtoioevdl0bjg23dev385/37593424670.pdfIn PDF document text
    • http://statenbracy.com/clients/d/d3/d362857cea7b6c304c7898dd6c6993b3/File/domem.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/450a8db9da6a7d04f697a0f5fe400327/sibuxuxepiwugijesiluf.pdfIn PDF document text
    • http://expresskaliski.info/file/sederilasatarajomura.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/penizadawupitezolodu.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/dotunite.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/utubbh3pjg2sc9l60rel70mrin/34443527489.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ab0e206fb---20118583753.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/nepemugiladamexogar.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/54393822739.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609050281cbc5---giwakunofagadironasuzizi.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d70e13a704b---41833479955.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2837ae6fd---zojoxe.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/xijebiketazu.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/d1bc6a76d0c7u9ld07imm09q72/gasekasilofuvitokijaxip.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/tolakixo.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608506500ee8f---61957038814.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB6 10672 bytes
SHA-256: b1460b42c779e06800cb730939dcd8d95a5bdaa5d1935f9ee86de4f4429af301
font_02_sfnt_off00012519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12519 29028 bytes
SHA-256: 8326922969ba841aa405e2c7afa5f55703048c45059550f2a95e92aa7b92bc7f
font_03_sfnt_off00016024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16024 3704 bytes
SHA-256: 83c18dd28e41d1760dbc2bd9d204bd5f5b97646bac62acc71963965ce9fdd0ec

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