Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde5cd3abf7f85e7…

MALICIOUS

PDF

68.7 KB Created: 2021-09-09 20:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 48953590696c0ff39093a4fdbb5761fd SHA-1: 41b2e8f8d6613154b6686d99137f19c72c2c9954 SHA-256: cde5cd3abf7f85e71738ad24cc5c73c0e2e3569bcc3396b15982a0e95f29a96e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristics indicate it's an image-only document designed to trick users into clicking embedded links, which are numerous and point to various domains, some of which appear to be compromised CMS uploads. The primary attack pattern involves using a deceptive visual to prompt user interaction with malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://readandenjoy.ae/userfiles/files/wotesipumurajudizonafebo.pdf In PDF document text
    • http://phuclocvienjsc.com/uploads/image/files/72129862023.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/lafixuxubopufuwigapumomo.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb70107966---kopimonil.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/bujujokurev.pdfIn PDF document text
    • http://www.siposferenc.hu/html/24483808046.pdfIn PDF document text
    • http://transbur.ru/admin/ckfinder/userfiles/files/19549206470.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31995916007.pdfIn PDF document text
    • http://gaestehaus-am-erlkoenig.de/img/editor/file/96476395948.pdfIn PDF document text
    • http://bugskin.org/userfiles/file/46666682850.pdfIn PDF document text
    • https://ostrichtours.com/ckfinder/userfiles/files/2691158162.pdfIn PDF document text
    • https://sarenpinler.com/calisma2/files/uploads/13481654067.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613704a525f2d---masidawidaxivumisexufod.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/69615761387.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16136552e86477---wibefakedazakuxorozatuj.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/72390880746.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/68221469680.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/toguwupovexabawesoduje.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/93802634736.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613239c7d52bf---juviresokiten.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/wajibakugobimexinajebozid.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/ea5e375c5c25b933f0f5d8813c6df32f/nawakofunup.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613875db78cb0---21634647457.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=present+simple+passive+and+past+simple+passive+exercisesPDF 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_off0000b1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1CF 10724 bytes
SHA-256: 16f8d402d6b8a179f7487c6d98d2877bad3871c0e6c3d7b2a09c6323a9afac0a
font_01_sfnt_off0000ca72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA72 13860 bytes
SHA-256: 76a4fd96e96bd17ffcd38186d3e88445378d392aabea5890e3ea113995f10ea4
font_02_sfnt_off0000ec60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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