Malicious PDF — malware analysis report

Static analysis result for SHA-256 718e6f8585ae10b5…

MALICIOUS

PDF

74.8 KB Created: 2021-09-11 09:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 38d15990100af4c4a9575acb1dce9146 SHA-1: ad08f9c6047a528bcf14ac0d9aad282239dba0c4 SHA-256: 718e6f8585ae10b50f8bcce5118e4f5ca3c09cf531e4f6931867c4966342314b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to link farms on disposable hosting, indicating a phishing or malware distribution attempt. ClamAV and ML classifiers also flagged this file as malicious. The presence of external URIs suggests the document is intended to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6016

Heuristics 4

  • 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.
  • 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://infrive.ru/uplcv?utm_term=free+music+apps+offline+for+iphone PDF link annotation
    • http://cuathepvangohaiduong.com/images/ckeditor/files/mitatewumuwogotefapap.pdfIn PDF document text
    • http://agt.es/files/galeria2/files/12728690219.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/88091507481.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/fapepixakujogenabobi.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210911111419277030150.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/55aa46c49ed495c76ad00856a2992721/55236332171.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-09-04/images/files/rikeriwebopixijekipowep.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/rivinefato.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44583068077.pdfIn PDF document text
    • http://jfe.hk/userfiles/24662526423.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/7012972659.pdfIn PDF document text
    • https://egca.fr/userfiles/file/32847221208.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/kizovifanoxenupema.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136af0b0115d---97193897011.pdfIn PDF document text
    • http://ustunongel.com/image/files/wefiwijire.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210905_4840F181797A4E5A.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/posizosubeginusi.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/87619918901.pdfIn PDF document text
    • https://yantrasearch.com/ckfinder/userfiles/files/93296542623.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/nadamosefoxibikuzobep.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/moxulilek.pdfIn PDF document text
    • http://arsvet.ru/img/upload/woxidenim.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/virajasorilutu.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/65045642743.pdfIn PDF document text
    • https://sangolongphuong.vn/longphuong/news/files/63158562785.pdfIn PDF document text
    • http://perfecturology.cafe24.com/upload/editor/imagefile/46076348102.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7D 17760 bytes
SHA-256: b07f2acaf12a0209ddfc82ac26666b8b32d0d3648eb7568faf77fe5796648695