Malicious PDF — malware analysis report

Static analysis result for SHA-256 82da2d451a6a982b…

MALICIOUS

PDF

70.0 KB Created: 2021-09-26 06:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 49eb5361e9b9b31d24746e3c01c917ad SHA-1: 992caadb0b1fcaddbf84171f0fcb243c112f44a0 SHA-256: 82da2d451a6a982b8b80f26467c82ff40e6c970a392e1247bf232b5a9f1f2087
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains embedded JavaScript and is designed as an image-only lure, typical of phishing attempts. The embedded JavaScript likely redirects the user to one of the numerous external URLs found in the document, such as 'https://oniceh.ru/uplcv?utm_term=clash+of+clans+mod+menu+2021', to deliver a malicious payload or phish for credentials. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://oniceh.ru/uplcv?utm_term=clash+of+clans+mod+menu+2021 PDF link annotation
    • http://enslev-anlaegsservice.dk/userfiles/file/96026684346.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/lerobavedopiju.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161417591f3288---96087685461.pdfIn PDF document text
    • http://tahyuh.com/uploads/files/202109011224182240.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/sijumunujavanizofukigas.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/83094551388.pdfIn PDF document text
    • https://derfo.info/resimler/files/67068143503.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/51260379534.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1612efec5a07b3---susiverozasirufonupabules.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/34229526869.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/jivofavediweborexusiroxun.pdfIn PDF document text
    • http://373113.linker.tw/files/10340037983.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/34826663601.pdfIn PDF document text
    • https://satesayap.com/contents/files/nanovedew.pdfIn PDF document text
    • http://smalternatywa.pl/media/upload/files/4744451a381282a6b4faef77e92fc6d9.pdfIn PDF document text
    • http://cachnhietwin.com/luutru/files/zirumotonikiforog.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/21863871933.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/tunusofutexunowekivopid.pdfIn PDF document text
    • http://marketingnews.fr/images/file/zuzusikajifaneze.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/29861894129.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202109021315364944.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/xedejanilikisarepum.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/zuxuw.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/61495127340.pdfIn PDF document text
    • http://xn--82ca1bkibi6eufn5bh1b7i3e.com/UserFiles/File/79597804256.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/90063929571.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/55247751549.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_off0000b4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B0 14044 bytes
SHA-256: dc3d8cd60b32249360772b60b4f9c63f6f6f6ff985d313f8785c92b87ed159d9
font_01_sfnt_off0000d725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD725 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3C 10876 bytes
SHA-256: a7e040e0b5e3a3e221674db67d4b9def1608f257b193b647e9a4e532116dbb97

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