Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35f13804015b11c…

MALICIOUS

PDF

85.9 KB Created: 2021-09-07 06:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 175e0cbef0ae16f145c4ea0315083bd5 SHA-1: 777a87de73bac6267c82bdf666d1b5445f327d92 SHA-256: c35f13804015b11c5f1f8e3b043bf306c903bb7796a3c2048c4081a175c6d5e2
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites. Some of these URLs are hosted on compromised CMS upload directories, indicating a potential distribution point for malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ph2020.org/FCKeditor/file/wefenugob.pdf In PDF document text
    • https://eletvital.hu/uploads/files/milibixej.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/mitetogutesafiruxowapap.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/73368308128.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/55447197010.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d70468c6fc---41630932376.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/69933587472.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/c35107b20c35199075412d5508fb4594/zejiwelewogozinilepezimod.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/5765099162.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/54086414553.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a2eeb35f9---76848993522.pdfIn PDF document text
    • http://apricomm.com/userData/board/file/wofamojiwolavolasa.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c59b2e2656e---gosuwupolizer.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/jibolirezevuzabexewotike.pdfIn PDF document text
    • http://ajeah-intl.org/fck_image/file/vusijiladelas.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a039ad7cff---purafiwobalaraduvos.pdfIn PDF document text
    • http://cf2sc.cn/userfiles/file/saxelijir.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/zapisonopapi.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/8738559396.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/soduke.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2f78308b2---gedogedu.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/86650566530.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d25f1a7a75---92633220716.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=trilogy+of+magnetics+pdfPDF 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_off0000dd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD54 11040 bytes
SHA-256: 9dab717390103e04fec3135e44c2040cd4ed21b0ff84f43d446e94dee8575925
font_01_sfnt_off0000f6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE9 22884 bytes
SHA-256: fc952de8dd60dbcf092e3bfb6a8429a4f8b0f649a6b95bbdaedb12a87bce6c16

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