Malicious PDF — malware analysis report

Static analysis result for SHA-256 2272d2d556d93041…

MALICIOUS

PDF

74.1 KB Created: 2021-08-31 01:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 23dffb4675722df01745d9f6fad0bab8 SHA-1: d2eba216040ff9e091a4c7c3cff673170ddf13eb SHA-256: 2272d2d556d930417471e43e064a4be22e341a71bb186967c21d57cbd2f81e9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to disposable hosting and compromised CMS uploads, suggesting an attempt to redirect users to malicious sites. While no scripts were extracted, the presence of multiple suspicious links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://humanlitech.com/files/files/40509407035.pdf In PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/1636545005.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/304f6b9b4fa90cd1681ea718be5346e6/99226185992.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/a6b15e1d2bb62832d58d0798a84cdbd3/5449598978.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/83572861215.pdfIn PDF document text
    • http://icsbc.ru/fuploader//file/24035999233.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e59d7c67e---96577382565.pdfIn PDF document text
    • http://newfieldclassof1982.com/clients/6/69/69e49ffade321d977af769e13f9f004b/File/ditodefubagewe.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/72463440758.pdfIn PDF document text
    • http://synhbio.com/upload/files/momobepiwilurazu.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/79135226730.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/rinimotetopilabut.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087cd9ba3f8c---tenoninilofom.pdfIn PDF document text
    • http://mezon.jp/userfiles/file/10264116580.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/mqt84uj7hktei3b1uvurhsfdaa/jekorezikilowa.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1610b3d6e13835---63731709386.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/53293835722.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/nazigiset.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16075bdfc693e4---jaxevi.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ae25749ad---17153717326.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/44863417746.pdfIn PDF document text
    • http://adice-area.com/pictures/files/futurokawo.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af7ebe798af---15623984797.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/d75c7b6b89be0bf3b0502a021a6ed2c2/piramuneb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+get+to+lothric+younger+princePDF 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_off0000c085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC085 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89C 10612 bytes
SHA-256: b3d52f853f105e77ee7c05893e93a4f254db9eb609c266e7d7f841b0f9232b39
font_02_sfnt_off0000f0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D5 16540 bytes
SHA-256: d3bbb97e14281dd2f73fe5f5735b0161aca6b0f782f26403b5e6455c64593b77