Malicious PDF — malware analysis report

Static analysis result for SHA-256 630d045e68b40358…

MALICIOUS

PDF

70.8 KB Created: 2021-09-01 09:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6a836c19f5a7f292af8097d209f43073 SHA-1: 9c8fe3ad274ab0bb3518026fb8b28941cfb9ab63 SHA-256: 630d045e68b40358243a6bc2d93ea0c868c3987cc538dad2f8c1453c52e7be5d
156 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs and links to compromised WordPress upload directories and disposable domains, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple external links points towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://cructi.ru/uplcv?utm_term=if+you+eat+your+apple+you+never+have+to PDF link annotation
    • https://afra24.com/basefile/afra24/files/zivanizunebibo.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8c74b4f601---78294925731.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/1f79f77b27a6c3fa69076bf466b1c87f/mexidevi.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/rivenujerumolutodefezutew.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/426f129e2b69fc1e32063e3a4ccb0a3e/liduzufonal.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/66db9b421e13a4aa0965b45bcfad2cb6/lofedowasexuveguduzewe.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/10daa36bafffca5dcbff9ba3c5d25d71/bajakejulovijomapajutug.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/nufogetamovikifavumaxuv.pdfIn PDF document text
    • http://congseng.com/uploadfile/files/xasenuliz.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/fexunaxakajan.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610cd3ebc51bf---towivadivaze.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210518105331.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/jefebod.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/53576728282.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/39618234880.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/83642553601.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/49235770340.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/54771464014.pdfIn PDF document text
    • https://kermanrooz.com/img/files/18048527608.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/rebonitimubomuvenuza.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/93043455063.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/14733491915.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a73a749419b---zofaz.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_off0000b86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB86F 10428 bytes
SHA-256: 7e8d049f8f6f2170f14236245efdd0c8c65054f9d6d2e15e697143067faf62ba
font_01_sfnt_off0000d007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD007 14560 bytes
SHA-256: 5ff4bc4b352e7f5638ec8aec14a075097578b760e3a321b313bf3cc55aaf26a7
font_02_sfnt_off0000f457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF457 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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