Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceef0801e0a125c4…

MALICIOUS

PDF

73.2 KB Created: 2021-09-10 11:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4f35220634e03a4b790b8bf99aed5b2a SHA-1: a57bd94f16364f774ce4833b325e9b1690b4b6cc SHA-256: ceef0801e0a125c4f472924cb7939a5c5609da1e537c3f549bbda50341a63489
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on low-reputation hosting, likely to distribute malware or facilitate phishing. The embedded JavaScript is a common method for executing malicious actions within a PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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://smidgel.ru/uplcv?utm_term=clash+of+hero+mod+apk+download PDF link annotation
    • https://nomaquito-travel.com/editor-images/tiwemevavatali.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/18865079676.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/nifalitedeboraxajisoti.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/kokejabukid.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/fudoni.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161378f042c36a---gogoroxugulitaxerixu.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/36650598225.pdfIn PDF document text
    • http://elard-group.com/ckfinder/userfiles/files/65421714972.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/kirovidebevejagimuv.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/23909837901.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/6662352592.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210903201407.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/bivagovomodoresexikana.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/mamiwutakebolowe.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/10246976292.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210903100122.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/24427264204.pdfIn PDF document text
    • http://getem.eu/files/file/rumilutulanak.pdfIn PDF document text
    • http://recrute.fr/files/files/5400207229.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/23028585413.pdfIn PDF document text
    • http://cmorshomecareassociates.org/uploaded_files/userfiles/files/xarogazawo.pdfIn PDF document text
    • https://nadrozmerne-sklo.cz/uploads/watot.pdfIn PDF document text
    • http://jump360.co/upload/files/20210910054742.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_off0000b864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB864 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07B 10780 bytes
SHA-256: c7267100d9b897b7067e5ecc4d3f3196d5b0f0aa2dafd0b609136ca9255ec7cd
font_02_sfnt_off0000e932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 17788 bytes
SHA-256: 9e0c68e064b1d0bf52668850d4f488425d165dffc7824592bfa67992d78250fa

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