Malicious PDF — malware analysis report

Static analysis result for SHA-256 15eaf2b36cb5c714…

MALICIOUS

PDF

77.6 KB Created: 2021-09-11 02:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 5c57cc3b1ee82a26732dd69ffa9bdaea SHA-1: 8edf7bfb35adfff2bd9899e00092b1a40692c8b1 SHA-256: 15eaf2b36cb5c71457f982eda5aa0071c23b3228a6a7d83069696eacc73de9bc
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

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://hotnews.md/upload/userfiles/files/suteziwokolavodebu.pdf In PDF document text
    • https://cuatudongsaigon.net/uploads/files/35413471522.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/31004493146.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/dokojosidomabibujoto.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/24060876471.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/51254228588.pdfIn PDF document text
    • https://revive.fashion/upload/files/fuxigo.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/bikisifofezigopuwarave.pdfIn PDF document text
    • https://betsin.org/userfiles/files/wirovag.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/1488094204.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/10216502015.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/lofiwusapegolofene.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/felopizerabubo.pdfIn PDF document text
    • http://dezis.ru/uploads/files/zevikonukaxudiwogajizigu.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/zovedatodixinifololekak.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/17437930903.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/debanebefonafelajigede.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/dopuxit.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/diwojon.pdfIn PDF document text
    • https://stephan-kratt.de/data/reiterhof/userfiles/file/mupifokalosu.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/tegavinurenuxexivefal.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a030386668---monuxavox.pdfIn PDF document text
    • http://gptools.net/userfiles/file/lorapiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+do+i+make+storage+on+my+phonePDF 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_off0000cbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C6 11076 bytes
SHA-256: 4df9e62735f0177351d084fc8b935aa2a984b24bfccc3a51354e1c8ba3a7a150
font_02_sfnt_off0000fd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD36 16828 bytes
SHA-256: 3f0f9661fec876d3ff517c5ed9750c3f64b9f6408206104c3160f8d5a320d70d

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