Malicious PDF — malware analysis report

Static analysis result for SHA-256 105d4b342d32d10a…

MALICIOUS

PDF

91.9 KB Created: 2021-09-19 12:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 06df172b5dde6dbe236c302e0f4dd890 SHA-1: bf81a8f39b8fed1428a10cdb97edd3ecf2295d56 SHA-256: 105d4b342d32d10aad0009992dc967bbdc1b54e6da8b29b9b1e7dd3a5f3dbcf8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a phishing lure, presenting links that mimic search results for popular movies. The PDF contains numerous external URIs, many hosted on compromised or disposable domains, suggesting an attempt to distribute malware or redirect users to phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a malicious intent to exploit user curiosity for malicious purposes.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3522

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://chcial.ru/uplcv?utm_term=zack+snyder%27s+justice+league+full+movie+torrent PDF link annotation
    • http://kangmeideyiliao.com/uploadfile/file///2021090517531693.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/54424485609.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/23438182953.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/wekegafuropozowezexopakug.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/komaju.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/75871222768.pdfIn PDF document text
    • https://maconlux.ovh/userfiles/files/voborosurewosadotegarokol.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a016929cc---jetalekowebuso.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/83510004733.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/19805887451.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/wirijonowidozes.pdfIn PDF document text
    • http://yuanjiangchem.com/upload/files/xudosikosavomolavuvajakir.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/19cd8f595db7562e76772511700449fa/47844930457.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/wiluxoxegodosuvu.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/kutazuzevejer.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137aa2ee7aed---jupug.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141975a435f6---465390963.pdfIn PDF document text
    • https://heritran.vn/uploads/news_file/jivupotujore.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/39239622669.pdfIn PDF document text
    • https://bloomeng.com/uploads/85356221230.pdfIn PDF document text
    • https://fultoys.com/userfiles/11467224034.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/nogolenazotoz.pdfIn PDF document text
    • http://qigong.ru/userfiles/file/55555926366.pdfIn PDF document text
    • http://www.moyekolodin.com/files/lurak.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de073bf175---2916799533.pdfIn 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_off00010c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C10 19200 bytes
SHA-256: 85509ee96b685cfb733d660c343c8032361e0c434510bbb60fa595ef57731601
font_01_sfnt_off00013e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15687 11316 bytes
SHA-256: 5d42b38e5db6fc677c6b2359f5aa07cc57ee76370bc7ba64874ad4af517d529a