Malicious PDF — malware analysis report

Static analysis result for SHA-256 425ffbbd17992710…

MALICIOUS

PDF

78.5 KB Created: 2021-09-20 17:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5040af4c7d13e692ba308b31aa4ddb0c SHA-1: b138553ecb0945e494c0eae80be74b3e0ee25108 SHA-256: 425ffbbd17992710cfcf3d6102141ba775aef05ee3f0ceb10e6d956723c006ea
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate an attempt to exploit users through deceptive web content.

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://coretry.ru/uplcv?utm_term=how+do+i+set+the+alarm+clock+on+my+android+phone
    • http://sieuthibds.net/images/files/55703327892.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/8b1b10f56cf547cf6a87d08f252d17b0/metomarowu.pdf
    • http://veterinariomauracotti.it/userfiles/files/82172562645.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614094bf514e9---pekazutefezowuz.pdf
    • http://mmbc.cz/_data/user_files/file/81806764893.pdf
    • https://neksav.com/upload/ckfinder/files/91808314024.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614565af35adb---91909122597.pdf
    • http://pneusmarene.it/images/file/58204849759.pdf
    • http://crestviewshopping.abwingsmd.com/uploads/files/robudoseka.pdf
    • http://schokozentrale.de/idata/tutuborarozamug.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9d818d856---78063863564.pdf
    • http://emusicmarket.com/upfile/board/files/79849722129.pdf
    • https://www.loisirs-auto-occasion.fr/ckfinder/userfiles/files/mubiganosogadovexiz.pdf
    • http://location-venise.com/italie_documents/files/febivewum.pdf
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/sosumimujuk.pdf
    • http://caerulumpharma.com/upload/files/7413119342.pdf
    • http://andrelandberg.com/userfiles/file/gemukofavomexoforipulajux.pdf
    • https://turismo-galicia.es/ckfinder/userfiles/files/fisunedepaboxesarizi.pdf
    • http://etasystem.net/userfiles/files/vizixubigolizebitewu.pdf
    • http://lex.tj/img/file/kopegabixope.pdf
    • http://okfilm.kr/userData/board/file/21074970512.pdf
    • http://duonglaohanoi.com/userfiles/file/balozunevudokavipodeviv.pdf
    • http://aylabawadi.ae/userfiles/file/2082054850.pdf
    • https://discovercefalu.com/_data/images/file/63949615235.pdf
    • http://wadirumshootingstars.com/userfiles/file///94359793457.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_off0000cddc.bin
38dcf66a5a06a155c37781cd39c93f9a99d830f20c5d2b41341b51481412889e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDC 17080 bytes
font_01_sfnt_off0000fa4e.bin
f679ce5b2fc79b309cda2a719f0165a8aacb60f20e85dd66a0baab4417d6d2ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4E 11064 bytes
font_02_sfnt_off000113ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113EC 16792 bytes

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