Malicious PDF — malware analysis report

Static analysis result for SHA-256 9affa9509d06495c…

MALICIOUS

PDF

92.2 KB Created: 2021-08-01 17:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2a1d3ef4e7dfc55c8f833658cf3b20bd SHA-1: 9f1d8a9314418996bd3c112a89d614d77ca507f0 SHA-256: 9affa9509d06495ce27a8ea9c73e3f355de6cf6c4a2f21cc6cb8de0aaae1f55e
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and a link farm suggests an attempt to direct the user to a malicious payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://alianzatours.com/imagenes/file/50556690644.pdf In PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160fa65af9c882---funur.pdfIn PDF document text
    • https://solucionaesp.com/ckfinder/userfiles/files/fefexozuvozim.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835053b7869---58494656214.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089543750ff8---1818428966.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac421fb23d8---xoxivuzoruvigol.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/8394258f69631c4f7fae46489bbef820/tomalivejenamofedipula.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/mumokulitumedibon.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160791be413621---panenikaminatinedalote.pdfIn PDF document text
    • https://cristalensi.com/public/File/jewaxexafozivazegefor.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/webusobiwufotaru.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c338abf129---rorupizazawabupobapa.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/3908525176.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a15d9feab58---boxiwila.pdfIn PDF document text
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/12653800435.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac76ff70d2f---41887443738.pdfIn PDF document text
    • https://pasarantogelsatu.com/contents//files/16428335980.pdfIn PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • https://okazionche.com/files/zewapifadiza.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/nexixadoninur.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb0a7070ee---82798622063.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/juzepepoxogapad.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/a3bfb60b3f42b4ba6c4b5eb4f1a6240c/32022188133.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/99943953525.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+download+memz+virusPDF 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_off0000fe80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE80 19908 bytes
SHA-256: 119614b7ff065fed37beb2413eaadaf472f8945c07f681589ab3374c79aa3be7
font_01_sfnt_off00012fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC3 10712 bytes
SHA-256: 904a1c649362ef6bdd358b1e9cddf29292b61c0ed0fa0982fc0f11569689df5e
font_02_sfnt_off00014860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14860 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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