Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39cfeb02489656a…

MALICIOUS

PDF

77.2 KB Created: 2021-09-18 04:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bb3767011e0521d572ad0075c40d03cc SHA-1: f49614252732c4cf0ac57bdd3a91547a76110b86 SHA-256: c39cfeb02489656ae4da06842f9d26d2019a6e13fc7dcd2515f62217d43942b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be redirecting users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://kanizsakran.hu/userfiles/file/51205849504.pdf In PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161424050d4e3d---lixibutajirokazusedufo.pdfIn PDF document text
    • http://quatangsongvan.com/hinhanh_fckeditor/file/kivos.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/ea5e375c5c25b933f0f5d8813c6df32f/nawakofunup.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/49513945113.pdfIn PDF document text
    • https://halead.com/uploadfile/1630818048.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e63b100ea---53513630059.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202108311745497689.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c34b514b2e---pemivaragetetizebitudasaj.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/zowinuvefov.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/5083152950.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/39231250345.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/xogetuvezejuxipevitifex.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/surebokudopomaxagesumi.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/29279687496.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/zopekuwojazepepije.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16136259d0bc7c---jinaki.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612f921f3a06b---60405476288.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135adb19539f---nodijakudiben.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/34844809b7be36a0962311a38f28b554/togin.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/mhv9ldpfqjmb9lo5qq27v2ubdj/68015803908.pdfIn PDF document text
    • http://ellev.fr/upload/files/naxubajipozokiw.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/wexotupo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=tempera+in+art+definitionPDF 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_off0000cc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC03 10408 bytes
SHA-256: bab03034ad17f013e9427f2dabb3d49944e6db47f98ce24dec75649c4fc3206a
font_01_sfnt_off0000e37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB91 17140 bytes
SHA-256: b9b8a8a499bba938f735ad14cba13f7787f5e137f65b37c1d23037b645b086d5

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