Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf4a00691060473…

MALICIOUS

PDF

83.7 KB Created: 2021-09-22 18:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 438e7397b3a137e7b0e77b6d42d9d1e7 SHA-1: 419fbb50d6244513880f776fd5d342cbbee9d36a SHA-256: faf4a006910604732a130f604f34f2837e473533e5965edd310f42eb367c5158
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is structured as a link farm, with many links pointing to disposable hosting. The presence of embedded URLs and the link farm structure strongly suggest an intent to redirect users to malicious websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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
  • 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://cructi.ru/uplcv?utm_term=game+keyboard+apk+download PDF link annotation
    • http://honyi.tw/ckfinder/userfiles/file/34645210632.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/29387140103.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/97434470129.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15253760908.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/kukifetoxofalujenal.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/bakipa.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/titugalimubataz.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/73137826645.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/40596497162.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/belutewos.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/86364726815.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161321ea95d64f---samawu.pdfIn PDF document text
    • http://rem-stroymont.ru/img/file/gevakifevetovesiriben.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/56575753227.pdfIn PDF document text
    • http://tfforming.ru/d/files/17459014343.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/37886771373.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/91315744225.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/66207364572.pdfIn PDF document text
    • http://apothepharma.com/upload/files/55110824136.pdfIn PDF document text
    • https://tele-video.ru/upload/files/23488994413.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/52492772479.pdfIn PDF document text
    • http://ormansagszive.hu/upload/file/28797489754.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/wowaripabasatokibufu.pdfIn PDF document text
    • http://riverhouse.at/pcms/content/file/nabiferibiga.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-9/20210909015941489231.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_off0000e426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE426 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC38 16928 bytes
SHA-256: 349750a4c570bda38e9c5c0fb6d80d7f67a379c7cca7c70020211cbad33b3a86
font_02_sfnt_off00012892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12892 10668 bytes
SHA-256: 37e5bb474e777fe6e31fc3706d42ef4d3a6bc44fb9dac9da7773d9c14be47698

Open this report in the interactive analyzer, or submit your own file for analysis.