Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c7d24493ce11ac…

MALICIOUS

PDF

90.9 KB Created: 2021-09-16 00:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 26f9d572dfce6b60daabb6138aa2e3f8 SHA-1: 84e7ba120f1d239b4f9cf246e6e1b80494a3d8a7 SHA-256: 46c7d24493ce11acff0d98e5351f647dbaa8ea2408994201b86b242653b43d78
142 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 ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to exploit vulnerabilities or perform malicious actions within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9744

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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://oniceh.ru/uplcv?utm_term=puffin+browser+orfox PDF link annotation
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613087fdb5f64---tuzuzepiworebazozivogut.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/lajudusinof.pdfIn PDF document text
    • http://teewer.mn/ckfinder/userfiles/files/konigufubaxiwagudasewa.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///34556120188.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/xebowaxo.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/83457415792.pdfIn PDF document text
    • http://ymmicro.com/files/files/fuleletadanubuton.pdfIn PDF document text
    • http://3t-t.com/User_File/UpFile/file/20210912031631_ZGFwb21pbGlsdQ==.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/finukatigi.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/257d8de1c51a85224ed98b08fb3309cd/sexadapubedagazi.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/pugivefujumabitadojaromok.pdfIn PDF document text
    • http://mskgroup-spb.ru/upload/file/21066228436.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/8159830022.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/52329556584.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109071127244718.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/76332993690.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/domifejasased.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1630551086.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/xukijinezolopi.pdfIn PDF document text
    • https://a-metal.e-giant.net/archive/file/files/6535870645.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/gozebowewimowudazo.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/1630949336880057138.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/jifogomo.pdfIn PDF document text
    • http://hanaelectric.com/userData/board/file/javoxeduzijunivupabeti.pdfIn PDF document text
    • https://tierlistei.ch/downloads/16920590775.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/muromeraxesixezulan.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B1 18884 bytes
SHA-256: 67f7e1abde96e82fff4b97e8bab295c80b4e075b6955d712f2f3d23f05444ce2
font_01_sfnt_off0001176d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176D 10332 bytes
SHA-256: ba74a672d81e985a5ebca023611d3a71f79c13bf9fc691cf112b3c614a4fd852
font_02_sfnt_off00012ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE5 16388 bytes
SHA-256: 3cecd24d7d326d46f8cf5f840d8834f03ec79f9ce2b3cbe15e01b9885af29c80
font_03_sfnt_off00014581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14581 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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