Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7beba6576bf7de…

MALICIOUS

PDF

68.8 KB Created: 2021-09-28 01:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0f5527cb0dd062165b54a3417e4dda20 SHA-1: 74e8e6e901c3bc2bbcb4a170fcbd9d3da1af9be7 SHA-256: 1e7beba6576bf7de998b3dcdc11895ab83c947e0b8f46706ecf69b220ada72e7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, pointing to various domains, some of which are associated with compromised CMS uploads. The presence of embedded JavaScript further suggests the potential for malicious actions, such as redirecting users to phishing sites or initiating further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • 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://catamma.ru/uplcv?utm_term=best+powerpoint+android+app PDF link annotation
    • https://cargobull.cz/res/file/28712145710.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/88302219566.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/26686998296.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/7542543106.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/71289047399.pdfIn PDF document text
    • http://fge-service.com/userfiles/file/27054635131.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/wonexoj.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/guzoloredazikired.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/24030237830.pdfIn PDF document text
    • http://tlca.com/Content/uploads/files/56867231531.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/godovarezupul.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/nabowisikawiri.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1615241d3010de---90544043130.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/87795166542.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/49548868835.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613eca7d3cfae---73358801322.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/depujawonep.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/suwanuvepebovare.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/dodexox.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/5934934598.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/tesafasuw.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff1857bf9b---53937638129.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_off0000afc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC7 10480 bytes
SHA-256: 94dd9dc1c02528d6b5676359a063034fbe0e2fd769c98a936a4fd6576fecb6b2
font_01_sfnt_off0000c7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE2 15216 bytes
SHA-256: 67756a9defd40f02f1ad1ab62d34183df26bd6fffd5b4d75f4b120ac5bf7462b

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