Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d46a339b0626e5…

MALICIOUS

PDF

82.8 KB Created: 2021-09-12 11:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8f646197bc9dd351562fd540b69e60a2 SHA-1: 7d29a645f595a9a9d0dd8f800bdb0e20d59efdee SHA-256: 64d46a339b0626e5ff12b9247a14cfd586ceb0c07460b906a7c9940d780c62b0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, flagged by ML classifiers and ClamAV as malicious. It also contains numerous external URIs, many of which point to PDF files hosted on various domains, suggesting a phishing or malware distribution campaign. The presence of embedded JavaScript indicates an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://gavionescodeinsa.com/userfiles/lakuxexew.pdf In PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/lifegelixejusilunebur.pdfIn PDF document text
    • https://oferta.lt/i/File/93842393975.pdfIn PDF document text
    • https://matricula.netlandschool.cl/files/raxufukijazezixinixodid.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/jezipikokodefekawivolukow.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/titigigiwazabajorifepikup.pdfIn PDF document text
    • http://www.moyekolodin.com/files/tavepubojuxo.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/86351127627.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210906092024.pdfIn PDF document text
    • http://teplospectr.ru/images/files/21442229810.pdfIn PDF document text
    • http://malabarisproducoes.com/arquivos/files/81568048025.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/warenewozonuvetipobi.pdfIn PDF document text
    • http://www.erealitysolutions.com/tennisontario/assets/appsadmin/js/ckfinder/userfiles/files/3407100923.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/jipided.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/60006823247.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/29232638805.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc6102307e---vezegemizujedoneladefe.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/jerebumejesirumigiwawo.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/sudowalojifuzenenesejara.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/64808438575.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/wabeku.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/zejise.pdfIn PDF document text
    • http://ustunongel.com/image/files/nujibimi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=download+followers+assistant+pro+apkPDF 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_off0000dad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E9 18920 bytes
SHA-256: ebbd8955f03b2f7813f0af3c4d4d0f6c18ed41ea81f2a2f5d7aa3d2f1ab4d29a
font_02_sfnt_off000124ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AC 10668 bytes
SHA-256: 7e12730bfbe1e9d0f23eb6494d7654480d529cb919130684a71fa5b0647a909a

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