Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fe9fefba0f3f77…

MALICIOUS

PDF

79.4 KB Created: 2021-09-17 18:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 88df956d79775bccd1f03a9e32791a00 SHA-1: fab2d76ec26bf05279bc9ecd3107cc28b7a87c93 SHA-256: 73fe9fefba0f3f77de1d609d1f55302f7cfbac71220479e3a977e94d9bc3f1ee
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to potentially compromised or disposable hosting sites, suggesting an attempt to deliver a malicious payload. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ehlibeytalimleri.com/resimler/files/89102325405.pdf In PDF document text
    • http://randoquad72.fr/userfiles/file/95480569587.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/1360467306.pdfIn PDF document text
    • https://citytrafik.nu/images/file/munidaw.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/gawexolateb.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/5535473042.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd6cb2fe6c---74469657653.pdfIn PDF document text
    • https://kawanmto.net/contents/files/83896687172.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614216b59bc88---girugo.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/3296551795.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613782482b74c---kijisetadaporetodemenopuz.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210902120520257.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/54559384906.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/87623193549.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/64792764990.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/japamizo.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/jobalomanijapijota.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/goluguwosozilunogilu.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/87009345538.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/dipebagonobujowil.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/jozililonal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=update+kodi+on+androidPDF 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_off0000d5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 10268 bytes
SHA-256: c988d59295fa8e5cba7a9be96ac2d5fc8349fd79ab67218748a8de62bcff59c1
font_02_sfnt_off0001050e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050E 16768 bytes
SHA-256: ba3079e12cd9e998de5e7773923a5dbb9d7c00eff4eb4dda8bfcc5059248d61b

Open this report in the interactive analyzer, or submit your own file for analysis.