Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c356d98cf41a20d…

MALICIOUS

PDF

86.1 KB Created: 2021-09-17 21:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 52820388b0e34f8bde499e009528e75e SHA-1: cb33edf2b05c9713baa183f5228b4d2daa0ae304 SHA-256: 2c356d98cf41a20d4519e69ecd5bc6a4b1027eb0f327cc4e8e2261e1348cd2dd
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV heuristic also flags it as a phishing trojan. While no scripts were directly extracted, the nature of the embedded links suggests an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3119

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://coretry.ru/uplcv?utm_term=wonder+woman+1984+watch+123 PDF link annotation
    • https://noticky.net/akce/fotky/file/remipejepen.pdfIn PDF document text
    • http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/guzikojod.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/67423621586.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/bilixebob.pdfIn PDF document text
    • http://yanartextil.com/firma/files/zojadefalaluzenuvelasen.pdfIn PDF document text
    • http://pololanna.com/user_img/files/40580027929.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/bepapamaribobadepa.pdfIn PDF document text
    • http://budka39.ru/files/misabusigigatilesegagix.pdfIn PDF document text
    • http://jadeite.ru/images/file/87519944098.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/1918230379.pdfIn PDF document text
    • https://maturana.cl/upload/file/wevagejegiro.pdfIn PDF document text
    • http://sintjorisparochie.nl/userfiles/file/bamivu.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/10992053547.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/zelezazanopuxijo.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/fagisusunuveruwom.pdfIn PDF document text
    • http://vo23.ru/upload/file/fisufatetep.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/25728325991.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/4750853477.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/67828652904.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/salalukixegebezibanegem.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/33425528545.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/puzusaxememediki.pdfIn PDF document text
    • http://jcpingie.be/public/files/78083657469.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/lonikadibiladuguzefenugab.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/komibabizidexoli.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FB 11208 bytes
SHA-256: 77e9695972315003fb3e56ae45cbd9c30402370d125940d4d04ddd50078f0b9d
font_01_sfnt_off00012d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1