Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db42d15762ba822…

MALICIOUS

PDF

89.0 KB Created: 2021-07-31 16:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9068059e66fe479279f7d1171e53bf61 SHA-1: 96b12bcbd6574cf253455f5c9fab8fd9b78e0b6a SHA-256: 9db42d15762ba82254bcb7b3dfaa92c08e4652da5b9ef3aea357cbc8601f5559
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, directing users to numerous external URLs, some hosted on compromised CMS platforms. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to lure users into clicking malicious links, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://caribemed.com/userfiles/file/gapuxukaligamato.pdf In PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077709a96d7a---golifefabamogivapatezedet.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/giwimirizikovudekiwo.pdfIn PDF document text
    • http://bryanhigh78.com/clients/72554/File/basikoriwewi.pdfIn PDF document text
    • https://iword.de/userfiles/file/25682416536.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae6a3ad08a---radikutapowofopijimawagi.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607788abc1cff---nixevuvigizarow.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/53755942685.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/47806240169.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909094f1268---92790279697.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/lavibodatomibesejud.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/puvesaga.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/b7qu684ot613tn2hc97910sje9/nofofidorepegiwevodufebit.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/e0fa463abc142a83fe1836d9376fdbbd/95519970230.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/30042606798.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077787de3b17---botepafebatirifewubepes.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/0bf8a8c187c0630c40cb1743de7ac30f/notodejizomukobejeweki.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/3d85a21e0e3aecc825ef78600685112e/xamunagigag.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/9222e2baf0fecf68efa022d85b72afc7/ravofenekurekepiwuvo.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/705c4c7b5748ea4633a3be876ee96b9d/gakapisosevadob.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5cdf5a895---82270911367.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a027b2b3be1---38143753764.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fffebacd1---veganojotigopixefana.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/2813932700.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/99449324163.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=at+dev+english+to+bengali+dictionary+pdf+free+downloadPDF 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_off0000f336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF336 11288 bytes
SHA-256: ed840883bb5ed966a01bd11ea8528ae02be85dc309fa20230bf45b1c8f2ad13f
font_01_sfnt_off00010d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4E 18304 bytes
SHA-256: b2481932ceb08daf1b4c5e1b3dc92cd2fdd3dd1fca5d9c6ba49d781b53df71a5
font_02_sfnt_off00013ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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