Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b5544434c3735f…

MALICIOUS

PDF

70.9 KB Created: 2021-10-02 09:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9b5bc94e9ad82b2bbc9b86bfbfc3d262 SHA-1: 50e010c1fda1fb9fb6254e36907381ec5537d245 SHA-256: e9b5544434c3735fd2e839faece3b9a8439f9d8706557e35d5cc1706de7aaffd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains embedded JavaScript and numerous links, many hosted on compromised WordPress sites or disposable domains, forming a link farm. The presence of JavaScript suggests an attempt to execute code, likely to download and run a second-stage payload, which is a common tactic for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://golf-tout-terrain.com/publish/page/file/37951638985.pdf In PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfa11b9d4c---nijotomexoziv.pdfIn PDF document text
    • https://ecoquimica.cl/dinamicos/uploads/file/sezudefulodenizotutes.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/56700618001.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/logubirek.pdfIn PDF document text
    • https://armenia4d.com/contents/files/ropovejawegi.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/50643403283.pdfIn PDF document text
    • http://hytechcommunications.com/userfiles/file/62233948898.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16134afdcd11d4---94970102872.pdfIn PDF document text
    • https://lrdreamteam.com/files/files/file/InfoProduct/file/bowisavonivafi.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210903040921.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/7765ff04a85b46b6136fe821164f8555/dodewug.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/82407638592.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/53035935311.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/05b6e56739860840eae24fe4a79670f8/balez.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kaxima.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/31264888801.pdfIn PDF document text
    • http://ideviceplus.be/app/webroot/files/userfiles/files/94321181844.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/romupetagutodominezudabi.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/surube.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140258b11538---25852454177.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/13316083492.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=farming+simulator+20+download+android+freePDF 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_off0000b25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB25A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6C 16352 bytes
SHA-256: 136395f4bfb09211109385e0386c6ecfdc464c2b9482852b9bd327bcc0afc25d
font_02_sfnt_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 11104 bytes
SHA-256: 59e08df3053db8c64856b319432a97d5fbec168a359b3b89fefd7cd8fdc68836

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