Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5e575cd831c105…

MALICIOUS

PDF

93.9 KB Created: 2021-08-12 00:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7d1f5646270242122f67f03cc99baf7f SHA-1: d99387d7cd3cefeb1090609da212099058516aa7 SHA-256: fd5e575cd831c10504372f7fa6f0c43efacfe2f4afb87a72f0866a6e940a662d
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains a link farm with numerous URLs, many pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of multiple external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a focus on directing users to external, potentially harmful, web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/727b33561b474c703939faa205755a3d/poxixaxuw.pdf In PDF document text
    • https://mamo-tato.ro/userfiles/file/84168238369.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0b01af463---46703663397.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/be871f4e090f7aa7f5883e8815c71deb/samunojaxebunab.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/4e8fe7b63e1219e9ea2f2bef4c527838/xogokemopowuno.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160f73ba51702c---tiwatunibolemu.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16081db92248fc---sepumidofululozelufib.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/waniwineriro.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705e7d12e97---jokugetupisur.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/29269588079.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/247f1be3bcf72c3bbffc11db200ae62f/50459215200.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/50053312517.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/kojupigonatago.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/0e112427f143aa311ffcb503cfaac154/dojaxasanufev.pdfIn PDF document text
    • http://amesonsofallen.org/clients/53156/File/buzabuxirisibusekitu.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/gowabuwuteler.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/jufuf.pdfIn PDF document text
    • http://phillipsbrothersmill.com/clients/6/65/65192871cce8a6e36080a9ebd2808b02/File/talubigevovawekapemub.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/f0k5l425ctor4ngk4phrftv572/palomojulefipojemeli.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/e58d141c16480f54405b2df236e548b1/wavuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=is+harry+potter+and+the+cursed+child+going+to+be+a+real+moviePDF 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_off000107e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E3 11332 bytes
SHA-256: 9965ae3dd004a29b15932a7372241356e9cd1ccaea0e71ee192af715559377a3
font_01_sfnt_off000121fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0C 17988 bytes
SHA-256: 8ba4211e2a93541bebda30216dc366846589174ef1db1255ff670642696e2f02

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