Malicious PDF — malware analysis report

Static analysis result for SHA-256 0971adbcd008fb51…

MALICIOUS

PDF

69.8 KB Created: 2021-09-19 17:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e94ea335ee96a6f92b42ffa408cf39a8 SHA-1: bf2dac79c342a1dfb751c9887954acc244bf9cd5 SHA-256: 0971adbcd008fb51e0d2e080945d83ade3ae6754d54a9c9eab48214f10f9fa0d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable domains, indicating a link farm designed to obscure the final destination. The presence of these links suggests the primary goal is to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://ptaki.info/imgekoprojekty/files/98082804453.pdf In PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/10147323382.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210917175838.pdfIn PDF document text
    • http://style4.allwebeasy.com/userfiles/files/zonizetajunewekufanug.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1631850451_bfef4923f1.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/liketudukojotezupifonod.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/46324226949.pdfIn PDF document text
    • https://italvaping.com/file/46070372408.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/34299010917.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/07/xesofaniguxujumijababokus.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/86328957676.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/natorisojikuwe.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/71907178223.pdfIn PDF document text
    • https://questyme.com/userfiles/file/82442876592.pdfIn PDF document text
    • http://vizcsap.hu/files/file/mijixafexelavebesopivij.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/e0e874e0a8fb3b8f72906a38a66b89fc/vedines.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210915_140016.pdfIn PDF document text
    • http://s2group.pl/userfiles/file/tusabaposaxonugo.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40168194363.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021091000554073499.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/beninageda.pdfIn PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/7848213899.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/gogeputuv.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/pedifudivipegadoroseja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=descriptive+comparative+research+design+pdfPDF link annotation
    • 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_off0000b2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACF 14712 bytes
SHA-256: dede66dc6edb4af878c40d4f0f25d7c22723b6e81f18d3efbfe228f494a21887
font_02_sfnt_off0000effc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 11088 bytes
SHA-256: 255b8c803beafb6ab35114d2b2cbc22332f9d485a683186b8ec35c1239b20c85