Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fd99e7fb920c5e…

MALICIOUS

PDF

84.7 KB Created: 2021-09-01 07:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c17746acfb499923d12f846c3886de26 SHA-1: 5e2f1c49151b410839554b59518025791d081f36 SHA-256: 98fd99e7fb920c5e4c1f9efe454cfc07f4fa6f9899d4a6ba0a956cfa2e2b13e2
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites, some of which are hosted on CMS upload storage. The presence of these links suggests an attempt to lure users to malicious content or phishing sites, aligning with the characteristics of a phishing attack delivered via attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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
  • 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://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/mb3l83sf1cj75n8a4hirpt23hu/bamofakexagigabazuzaruba.pdf In PDF document text
    • https://hometeamcorp.com/images/usr/50510858772.pdfIn PDF document text
    • http://1000projects.ru/upload_picture/file/39390295155.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/ef48f62d362a3b6e35d626e56ae93e3c/najagod.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/9276715257.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/83201919087.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/40611740308.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/87261561822.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612bd20d2845c---83254515343.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb943723d83---vilakigudogizavaniwopozav.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8dcd1602e---gujevifalawivoliri.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/f4d2dd0133b84990ea2f54d0dfadf11d/99935235833.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/vifididapisoge.pdfIn PDF document text
    • http://carsongrad75.com/clients/3/35/35717660c32d3dd9b0ffde8f33a19d23/File/raduzagivetepoziragedejo.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/83353843732.pdfIn PDF document text
    • https://diphong.com/uploads/wibet.pdfIn PDF document text
    • http://cesmclassof68cheyennewy.com/clients/82478/File/xasosevefadobilinuvixu.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/puragowipizif.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/files/65992156595.pdfIn PDF document text
    • http://baudoinfamily.com/clients/f/fc/fc66627f90e8a365851b026dcf169025/File/9734560417.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/21166849203.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16105907a2921e---47374264578.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/gutuzanoxo.pdfIn PDF document text
    • http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/nafazu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=crabs+for+youPDF 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_off0000e8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D3 17280 bytes
SHA-256: 65f329f931ce6dbbb214b4e1381ac4a02d98b45b45b0ad3622d9cc067e28b4cb
font_02_sfnt_off00012dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBF 10120 bytes
SHA-256: a998ac2e386a753bf1c8c0f7422b7b36647f87778471fe1545508f8914991864

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