Malicious PDF — malware analysis report

Static analysis result for SHA-256 12204bfae5f93c7e…

MALICIOUS

PDF

81.1 KB Created: 2021-09-16 16:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 01dc65118eb36f453632ebe938d107fa SHA-1: d3a443e45c308e8a3bb303188aa4c82472143b59 SHA-256: 12204bfae5f93c7e83c3ed4454f78635883ca7de638c0b15889d198501d528ee
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to potentially harmful websites. The PDF structure and numerous links on disposable hosting point towards a phishing or malware distribution scheme.

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://smidgel.ru/uplcv?utm_term=malayalam+novels+read+online PDF link annotation
    • https://medicabg.com/uploads/wysiwyg/files/xesukidodomesin.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/1919682785.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/xugarovegukujupizi.pdfIn PDF document text
    • http://biosite.ru/images/news/file/jimekukixi.pdfIn PDF document text
    • http://xn--2e0b95unoa536adofm5h.com/userfiles/file/79078567717.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/sitesisesimafegija.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/jojevusapebinivexavema.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/28540070976.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/roxivolalusemi.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/pajeluvodiralegurekenowo.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/55604393925.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/jedeposuje.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/xeromegikabuporevirez.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/52422068289.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/ziruwepekurugopetugijalip.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/51716224187.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202109022303233591.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142b5213b7f8---gewojobifab.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/bagewi.pdfIn PDF document text
    • http://ranch.pl/files/file/96442249811.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/rogajekezamexivezurog.pdfIn PDF document text
    • http://nhagiatxanh.com/public/default/ckeditor/files/lurase.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/56391942575.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16141e624ea5f5---nadat.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/gulibamirubev.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_off0000da18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA18 17348 bytes
SHA-256: c0f384f3ed4a0f53d1b334d04bc0e4b4fefb0ee4e8ff62a19e26bc469dd3c5d4
font_01_sfnt_off000106c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE0 10484 bytes
SHA-256: 959eba193088e67f1c7540253d75b799fdeea6a6244465090a41f2c6772d0806