Malicious PDF — malware analysis report

Static analysis result for SHA-256 dade6a8c09203957…

MALICIOUS

PDF

70.4 KB Created: 2021-09-25 12:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 146ad45bef7607c996ae3343f5ef695f SHA-1: 2aefb938c302d882014633529ffaeae81a574023 SHA-256: dade6a8c092039575642c5cd8b956b8d23687aad4f88b879739b0f5a34d788a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these link farms and the overall structure strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=fun+run+apk+smartwatch
    • http://beamstraffic.ae/amb/userfiles/file/29019395767.pdf
    • http://mtsskzy.com/userfiles/file/lotizofoxepipelitemudali.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131d7fdeb253---42927811054.pdf
    • http://mastervgtour.by/var/upload/file/finufutinemewa.pdf
    • https://ripedzn.com/app/webroot/files/fckeditor/file/5801186602.pdf
    • http://futureinfashion.com/ckfinder/userfiles/files/tovunasufesepajuzupafuxeb.pdf
    • https://petrovsky14.ru/docs/files/mogosub.pdf
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/21831297113.pdf
    • http://nhatnamvina.vn/rich_editor/file/folipew.pdf
    • http://metallpress.ru/files/senanebixit.pdf
    • https://autotronics.vn/userfiles/file/56866267562.pdf
    • https://harkakotony.hu/UserFiles/file/88309659662.pdf
    • http://dmkaudit.sk/101/upload/file/49162917337.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0736e7756---wubexubetumimefute.pdf
    • https://bruceleevideos.org/images/file/83295717101.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149169c19249---15987163690.pdf
    • http://skybuildinfraprojects.com/uploads/11637480828.pdf
    • https://makenie.com/upload/files/544045080.pdf
    • http://drzwiukryte.pl/userfiles/file/poridutilabemef.pdf
    • http://saharun.org/uploads/ckfinder/userfiles/files/dijasuwiwubojerole.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0cd23aff7---xoxavetuwabibilej.pdf
    • http://maslatalaia.com/userfiles/file/vedupijefoxutiwebek.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/234657faa8a5e4e50bb21b6c0b17791c/zetelediveme.pdf
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/wuzasamatunojavowuviw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2ec.bin
d889b2d6b943aff06863369378a26ff9fd12b5f3dcb4856f6fab03dffeb77f94
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2EC 16168 bytes
font_01_sfnt_off0000dc21.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC21 16792 bytes
font_02_sfnt_off0000f438.bin
258552f5ee86b57efd639e30c30160e5ad91ba80ed187a095a533f9400d93874
pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 10504 bytes