Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbed5d0703bf717a…

MALICIOUS

PDF

83.6 KB Created: 2021-09-07 07:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 548d36acaaeb0b01913436cd7e438c77 SHA-1: bfed34fa055230147c6ca4a3cd325c3d64f66bd9 SHA-256: fbed5d0703bf717a0009c285116347f57f0d7c25624e15ea7bf2ce864f626fdc
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that form a link farm, directing users to various compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure and URL patterns are consistent with SEO poisoning and disposable hosting tactics to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=nalbufina+bula+pdf PDF link annotation
    • http://cristal-in.fr/userfiles/file/36947598355.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/zagulidagomomasokumuloda.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210816_FFEA5D4059838659.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/mavoxiwaximoxegifizojusaf.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/1167f3bb545c4ffbf3768730ebcbb6ba/wosotipisopixipi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbd96a20224---sataxadanoluxexigikivuz.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/63455722912.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c534de95571---vakasawakegog.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74582040732.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d616efb76b8---66831354056.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/a236e34b0982442d12f6e65871626f46/22598371207.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075bd9879c63---lujuvidab.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/28398350313.pdfIn PDF document text
    • http://maduraigarlandshop.com/userfiles/file/depebofemaf.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160748b4ce99b7---didawo.pdfIn PDF document text
    • http://biosite.ru/images/news/file/19805990871.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/69831375759.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/pesusalugixulowe.pdfIn PDF document text
    • http://jarosi.hu/files/file/2384310259.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69a50e331a---11275589061.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/xamopigugo.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/c9niikq8r09p93fl7s3i0ij3ge/88718693172.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/bukosuxoxidobimovodadas.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/76074424522.pdfIn PDF document text
    • 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_off0000e2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BA 10092 bytes
SHA-256: a3f178719780027a04e3b30b5f7172025ec310b467998711c4d14afeec62076b
font_01_sfnt_off0000f8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EF 18492 bytes
SHA-256: 5830e174ce866de6993d8872989763d5bd15b01f9d9c5fc45072d2c38730a6c9
font_02_sfnt_off000128ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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