Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4624d117c28717…

MALICIOUS

PDF

69.4 KB Created: 2021-09-25 00:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fe59199aca4d6dacc1c34732d47811ba SHA-1: 8178d40f32cd76f5114909359efc82acf132b507 SHA-256: ea4624d117c28717538b226df86cabd85323849af6dc5a4ccf27eb665eea3fbf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. These URLs are likely used to redirect users to malicious content, such as phishing pages or malware download sites. No scripts were extracted, but the structure suggests a link farm designed for initial access via phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://ketchas.ru/uplcv?utm_term=http+dose+v2ray+vpn+apk PDF link annotation
    • http://milwaukee.center/userfiles/file/rapebawerasaredugikiv.pdfIn PDF document text
    • http://uteambio.com/upload/files/36061368273.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd85953bdc---sufeg.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdd3b14345---zopejutofika.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/98017357010.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/21015019676075c9c835e1857d874b54/45503701698.pdfIn PDF document text
    • http://kleni.cz/userfiles/file/sinirutogun.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/rajekafegagazitu.pdfIn PDF document text
    • http://aptwash.com/userData/ebizro_board/file/78031313776.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/tevilojiwugeze.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/43318710580.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/podd5ntuc1dn6a78p8o4fnra0d/kuguta.pdfIn PDF document text
    • https://nidi.mk/ckfinder/userfiles/files/dovufedivejidovetawuj.pdfIn PDF document text
    • http://budapestpainter.hu/ckfinder/userfiles/files/rogejewizumefegumoro.pdfIn PDF document text
    • http://kleiberit.ru/files/file/runow.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202109130722534495.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/xefinelibegimabadusemawo.pdfIn PDF document text
    • http://zzquansu.cn/d/files/45242014478.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614614d1aed8f---kafigekulel.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/26540145674.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/95744210319.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613050a074de2---56743832874.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_off0000b0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D9 14752 bytes
SHA-256: 0d0f6ab983fa5f8da37256f3c16b054f2d5dea2d21fe4bac4e57aeba364f81ed
font_01_sfnt_off0000d5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000edf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF7 10632 bytes
SHA-256: a6c1827a913a35f4d34674f0bddbe5a871132f78ffd5e2cd6ce6e39417d71aae

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