Malicious PDF — malware analysis report

Static analysis result for SHA-256 273c7ef1ed6aee83…

MALICIOUS

PDF

77.9 KB Created: 2021-08-29 00:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: aeba917e02aa78597f8a9674e6455682 SHA-1: 7d34af59b11ae8cf3486bfebeeefb897f9ccc428 SHA-256: 273c7ef1ed6aee8398c64163a9feb41166c30e0028cc12e97b5b497b0a49c8a8
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malicious content delivery mechanism. The PDF contains a large number of external links, many pointing to compromised CMS upload directories or disposable hosting, characteristic of a link farm. The primary purpose appears to be redirecting users to potentially malicious websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://pnlcoach.com/misc2/file/ In PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/sesisivo.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/rolenefavurenawela.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/25697991819.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/topalusoxakuz.pdfIn PDF document text
    • http://e-hematologica.com/users//file/62658466579.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/48043147977.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/mizogibapisela.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/pupib.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/fikitumo.pdfIn PDF document text
    • https://notrepanierbio.ch/userfiles/file/sokagewutaturapubu.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/73941360829.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0cf5521e7---mobudaxivoxulipuz.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/54587828645.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/311cd24e335f2d07a30fc9d28fdcf5c1/fitiwobitu.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/69c350bc92ddae9c547e35c3843b6f24/11711349863.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/578800a5f7fc9a8533ba3d8dc6ee7638/xevefunagafoxifofuj.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160708b113481a---26676262906.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16071a98c7f374---nonubitobetavilaxibaxe.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com//ckfinder/userfiles/files/wogejutikotunobaweladom.pdfIn PDF document text
    • http://artospace.com/pics/file/62606907077.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/gewitagowezuworo.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/nokewesafutifoba.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/wovajudutozovumota.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc486fb885b---42511961660.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/81705525999.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=two+a+catPDF 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_off0000d0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BB 17264 bytes
SHA-256: 6fd9e4830e29af5e4e88f0c859f61a0c15f68821077835de7dbea51a387bac1e
font_01_sfnt_off0000fd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD04 9632 bytes
SHA-256: 0580ddb1a0b189a4d529901899ade3297b088cecd5ab8fb513a6f211cea67bba
font_02_sfnt_off0001121d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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