Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff972834ea33a2ba…

MALICIOUS

PDF

81.9 KB Created: 2021-09-13 22:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d451e45e910f19cb76be6ed089fc806b SHA-1: e252247d1b8535ae80233e652f18c4dbe13c43e6 SHA-256: ff972834ea33a2baeab863eee8a8e0ccd6a7b6db0c3b8f9238476791bee3a411
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains a link farm pointing to various PDF files hosted on disposable domains, a common tactic for phishing or malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a method to bypass gateway security. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://coretry.ru/uplcv?utm_term=android+never+lock+screen PDF link annotation
    • http://special-pharma.com/upload/files/55404313061.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d9b8f220e---lewajoxug.pdfIn PDF document text
    • https://lemarko.com/userfiles/file/dujojut.pdfIn PDF document text
    • http://susasoft.com/upload/userfiles/files/87834929323.pdfIn PDF document text
    • http://sudeoksa.com/userfiles/file/20210906051336.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/1902601869.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/munifutunebalimojepanuwe.pdfIn PDF document text
    • http://olivetheater.com/userData/board/file/depezuxafa.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/vovawagavabakararota.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/32859539947.pdfIn PDF document text
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/valedugasifoladadefewe.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/bikatavebexuvozes.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/zidutojanigosixinumijivo.pdfIn PDF document text
    • http://kite-surf.sk/files/75654668281.pdfIn PDF document text
    • http://01host.ru/userfiles/files/kiwogexeli.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/37856170166.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210912030234.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/39854707a890e901d9fdab8ab8aaf4ae/bigaribumozikuwosa.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/kumura.pdfIn PDF document text
    • http://sromedical.com/file_media/file_image/file/19412073407.pdfIn PDF document text
    • http://proxima-online.it/public/file/lanufetalezegolewesij.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d85d169115---10232990609.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/7703135947.pdfIn PDF document text
    • http://sdes.in/uploads/33465921184.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_off0000df11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF11 16896 bytes
SHA-256: 2625834c4904b623e2ea216964f6c646e9bcc08db305f1a248f62d483c231bed
font_01_sfnt_off00010af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF0 10244 bytes
SHA-256: e1c8aad87032e55ee54c0fb4524fd27e8a6933376b61408b4c809bd4f8045ffc
font_02_sfnt_off0001220c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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