Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4dc01a606d3a9e…

MALICIOUS

PDF

98.3 KB Created: 2021-09-12 04:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fbf3e990524a71829e2d3bad062063e9 SHA-1: ac8251daa7eae7f560ac7561329bab60aeabd56f SHA-256: cf4dc01a606d3a9e796eb9987ff6395379e9d8b336c0a51968a137b8cf0a9464
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to various domains, some of which appear to be compromised CMS uploads, suggesting an attempt to host or distribute malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://sgcaregiver.org/contents/files/26779465430.pdf In PDF document text
    • http://dribblebar.pl/userfiles/file/nobedanoxutinifelazepabu.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/49913402623.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613d19f9cf82a---68002685336.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/62668082114.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/nikti8l1cakhvaaq6vn369u9o6/91243711030.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/58935002821.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f061ca446---71235541622.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/totuvurotegen.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/gevudapakibizonel.pdfIn PDF document text
    • http://winso.tw/userfiles/file/juguratubolegibamezabex.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/defixizekov.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/dobigazaxu.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/jokupewonuwesolatu.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/vuwilaxagimefuka.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/64f6fc71586eff544c7546218c7de3c1/54326613792.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/09/12/file/20210912_055924_185.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/85915452682.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4a8770655ec78d86f50c411f5a8ceb54/1983819427.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/94441258091.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/715c44f46ee579ac703cb45ad1e56f05/80577282895.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/11194941833.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/13457b54b68d95eafd4b2187b0b54719/raduwasari.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/momijawerinuvixovabozi.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/lemivimikedopawik.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/3egn8cpl2lo88u0pioduqeu8g5/90600669862.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=1237x+movie+downloadPDF 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_off00011dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD7 10592 bytes
SHA-256: b6799fbdca59b8752f22a56cd04576864e82ab6ac518a30651f2724b0478fb67
font_01_sfnt_off0001361f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1361F 17492 bytes
SHA-256: 4db244ce190b01b3238dc6889cd6508e62d208f9a4b7a1e71e617af5a9f1fd81
font_02_sfnt_off000163a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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