Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae6b9f649d17a0c…

MALICIOUS

PDF

89.9 KB Created: 2021-08-09 17:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 48a5a2a3458427b3687e41eddb8bbea0 SHA-1: 263ef372f6d7baab62f1088f4fd05133498aa430 SHA-256: 9ae6b9f649d17a0cef2a28b57444f8005dd86685a62003a745edc13c309d241c
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable domains, suggesting a phishing or malware distribution scheme. The PDF's structure and the nature of the linked domains strongly suggest it's part of a broader campaign to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9884

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 http://self119.net/upload/userfiles/2021/06/files/210628135806.pdf In PDF document text
    • https://anakmeong.com/contents//files/22542391612.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/3dc571695a1a77d5e5b1da401fc11af7/73235168306.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/32763343147.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/85a95a511913ab7a8b14c07928c262aa/musaguvofoxiditegax.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/77774558954.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e171d2a56---madovivesuve.pdfIn PDF document text
    • http://centromp.it/userfiles/files/fakulokibatedamopoveramif.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/pipulovagokovek.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ec9091202---95376069919.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/wonuda.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gewejetebitomeresezo.pdfIn PDF document text
    • https://tsegypt.com/file/12680633938.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/51231308023.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/5e3303619c2caedf50aae03808e7faf9/46171823003.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/ebt0ohna89ro4lcr5f0f8l6cj5/49612434694.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9b339f9d5---mavugiwijo.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927f3b76406---57767702534.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/dagorugotuf.pdfIn PDF document text
    • https://ever-progress.com/upload/files/33397947797.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/24357343647.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2cc6b309d---beserolanoku.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a3501bb51a1---81681822614.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160702befc70b3---80095188168.pdfIn PDF document text
    • http://flirdining.com/uploads/files/vivexowedovir.pdfIn PDF document text
    • http://sdds.be/userfiles/file/79698200385.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+the+feminist+theory+in+literaturePDF 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_off0000fb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB68 17212 bytes
SHA-256: 0b1da1cbff00a6c59e9b771af0760f5dd3fed6cc505721494eb6342ce0666f7c
font_01_sfnt_off000127b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCF 10684 bytes
SHA-256: f27936921a51a86d644bac029dcee71e9c3b454115e9144d7ccf1ee0de8af72a

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