Malicious PDF — malware analysis report

Static analysis result for SHA-256 d024a0d68eb71fdb…

MALICIOUS

PDF

79.6 KB Created: 2021-09-18 19:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1fdfe8ec9733c41e37be3ce1c52ec320 SHA-1: ac76d77f62d4685ecd20a34890183a1881c8fd88 SHA-256: d024a0d68eb71fdb3611e410d63b96875d16e91cd10cb1bcccaff0e88d17a733
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to T1059.007, and the overall nature of the document suggests it was delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://synerhu.ru/uplcv?utm_term=android+studio+change+background+image PDF link annotation
    • https://khanoomhoteli.com/basefile/khanoomhotelicom/files/mivosafom.pdfIn PDF document text
    • http://kramor.bg/userfiles/file/fugimorefopatoxenepila.pdfIn PDF document text
    • http://web5gstore.com/Files/files/2172845663.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/52766882884.pdfIn PDF document text
    • http://worldtile.net/jangheung/userfiles/file/kegufuripilif.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/a0809bcad3684bc3e3a7f828d494d6d1/xorejizode.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/likajanasuperovaluf.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132519dc8f38---zifidobo.pdfIn PDF document text
    • http://vetranhtuong.info/luutru/files/37834936624.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/pusolepa.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/34287478929.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/losufisebuvemi.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/fopupakakebiseganopaz.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/betuj.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/94518131711.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/mufarilupobo.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/gixike.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/74754853365.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/74034247.pdfIn PDF document text
    • http://haai.org/upload/file/vabefuwesofojuno.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/14900222775.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/kizabibumejuxofivurojomag.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/86721403066.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/77957358557.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_off0000cec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC9 18220 bytes
SHA-256: 10c61147d9ee96fb3705a13a545bc526a7d5e9ddbfebbb7e788e01f0bbf6c866
font_01_sfnt_off0000feb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB6 11084 bytes
SHA-256: c9877568c6f7ddf440b35dec16854e99ec78711412b81c5485cb234e2c22d2ff
font_02_sfnt_off0001183d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1