Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffaa709f5799cba2…

MALICIOUS

PDF

79.5 KB Created: 2021-09-08 10:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e0da9acf6e675a344cfe0d234e94b08c SHA-1: a3057e3148844f526f29c80f200e3d134600d0c8 SHA-256: ffaa709f5799cba27bf7d5797f95c5dc6c7bcecc5770df296d566c29423cac82
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 and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. The heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute further malicious content. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607e752422561---lalugakuki.pdf In PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16200791827978.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/sadaradejovanikirumuroge.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/sumezadedigiwalogogojo.pdfIn PDF document text
    • http://kavtas.com/images_upload/files/39509647685.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16134337a0264d---geloxafesa.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/c8dbd6d9970bcfd34532ad10824eaf48/namili.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/45060388202.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ep4gbjjqdhb8v33iv6dhqjkgq5/gaterubopibenavodag.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/36655619707.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/gebesu.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/bujunijowunufunopavowe.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a46895f402e---weramazusojugumirabas.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021072723095263.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdcd543373---65375815965.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/tikemivoriwazukidavag.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa96e5eff9---godin.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/zisonibijolola.pdfIn PDF document text
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/097b150541d98613ba76e2fd1b821aec/rezulidexezijiwevolame.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/8936219226.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160af9640251cd---35030620468.pdfIn PDF document text
    • http://beiks.info/public/file/ruvogur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=mouse+brain+atlas+pdf+downloadPDF 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_off0000d2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EF 10812 bytes
SHA-256: 61a358780c060d1baf124d41cbd0320bfc798b4cd75845d056c1a4bd93996546
font_01_sfnt_off0000ebd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EB 17248 bytes
SHA-256: a2127b0d759c6cf48fa1d9f6a85254c1487552d1a42a5cdf29a8e60a6121e81e

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