Malicious PDF — malware analysis report

Static analysis result for SHA-256 02fb9162b612a82b…

MALICIOUS

PDF

82.2 KB Created: 2021-10-16 02:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d9fc0fc8890169516b5d9a7b926bd807 SHA-1: 723712ae9bec42d46d8652dd8d25091aad31147b SHA-256: 02fb9162b612a82bd3d72d428068df008ea97a603cf036abf7741d9de3e074ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to potentially malicious domains, forming a link farm. The heuristic 'SE_CALLBACK_LURE' suggests a phishing or tech-support scam pretext, likely intended to trick the user into visiting one of the linked sites to initiate a fraudulent transaction or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://zlato-stribro-investice.com/upload/files/14151560837.pdf In PDF document text
    • http://cwpni.com/userData/ebizro_board/file/43153894583.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/ropejir.pdfIn PDF document text
    • http://sfinance.mn/userfiles/files/dujigadapujobadudezotodi.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/laxuboxixezopevaduxagag.pdfIn PDF document text
    • http://climtech.com/files/files/76436574489.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/zapinisi.pdfIn PDF document text
    • https://ski-valloire.com/ckfinder/userfiles/files/wiratukimiba.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/40826054725.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/64877224497.pdfIn PDF document text
    • http://gapp.fr/medias/files/nipigovinupapibarujad.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/32990168690.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/65146150626.pdfIn PDF document text
    • https://kaimano.it/file/bukolatepojotuxoge.pdfIn PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/lutifopa.pdfIn PDF document text
    • http://gartenbaukoeln.de/uploads/files/nagukoxuj.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/buzijal.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/riruwijagam.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/9a9c446baad6820265aeb4d63b18e39f/remefisaruzadosokopifi.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/69371194517.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/xujinejuwakuwonudejuga.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/98167276466.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/60334448404.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/jozogojedito.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/70465134998.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/HTGXzuRVGb4/uplcv?utm_term=rename+many+files+at+oncePDF link annotation
    • https://www.thc.gda.pl/ckfinder/userfiles/files/55774870001.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_off0000dc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC43 17900 bytes
SHA-256: d1b2706d946157b784241a799624563241c6a4d436752df8cd5cfcf1bfd8f2e6
font_01_sfnt_off00010ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB1 10556 bytes
SHA-256: 3e7b18ad31803dcc01c18fd2968247e1e7c526dc6ea4730530a960311420f483
font_02_sfnt_off000122cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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