Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba26520571d112a7…

MALICIOUS

PDF

82.4 KB Created: 2021-08-17 00:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4154df1fddf0cab9d6b80f7d5cc13244 SHA-1: f356d0a1c5cb53a030c2476a3b5d3f8e7cbbae8a SHA-256: ba26520571d112a77d8ed17a62808b1319ff1c538aebf80b733f3f1dcc2857f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially harmful external websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://podereilmontaleo.it/writable/public/userfiles/file/99960887348.pdf In PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/66615367241.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607112706cd68---53156018005.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210616115905.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/votewoxotasidaronus.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/25690306268.pdfIn PDF document text
    • http://abwva.com/uploads/files/24085019689.pdfIn PDF document text
    • https://activepymes.com/pub/file/rowipuwuxafikukinafer.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c7c6e8ded---lebezupumunolim.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/51633659728.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/5dnp7bo4nl15ra6ef8sjrdirdd/32834768190.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/hs2uop84igq2dlq2rt6f26p81j/nimafilasatikisujirilolu.pdfIn PDF document text
    • http://prestinireedcorp.com/userfiles/files/55207821385.pdfIn PDF document text
    • http://liyangah.com/Upload/file/pevixumitanelivosefavuka.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/39330294506.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/vrhti8jdcha0dinteevc813ef2/zotukiletolev.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/88323954578.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/dapegav.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/lumetosaxe.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0470c2c91---fojovipezame.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/7096f73832ba055967f25fe981b35f44/xifomekafurisu.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae96c3cdca9---91877726463.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=roms+for+ppsspp+goldPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/razebosi.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_off0000df00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF712 17688 bytes
SHA-256: 5d6e282cd1663b3e762b819c0f21a34482c2d5beea997af45bf667b1a567a724
font_02_sfnt_off000124db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DB 10300 bytes
SHA-256: 449654676e6f8560094ec7742dbdf686b65de582e340e613335313d3a53fdaf7

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