Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f56129ccab97f3…

MALICIOUS

PDF

82.2 KB Created: 2021-09-17 21:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fdd6fd8e79a005aead511a84df7b8ae7 SHA-1: 5168ab6d6662854e87c2a0f1ddd087185b4a7a0d SHA-256: 27f56129ccab97f3311ba052a1cb3b337b920ded05d8895e478d823784678aba
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ClamAV heuristic specifically identifies it as 'Pdf.Phishing.Trojan', reinforcing the malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns strongly suggest it's designed to redirect users to malicious content.

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
    • https://noticky.net/akce/fotky/file/remipejepen.pdf
    • http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/guzikojod.pdf
    • http://servicedental.it/userfiles/files/67423621586.pdf
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/bilixebob.pdf
    • http://yanartextil.com/firma/files/zojadefalaluzenuvelasen.pdf
    • http://pololanna.com/user_img/files/40580027929.pdf
    • https://ofly.om-digitalsolutions.cn/upload/files/bepapamaribobadepa.pdf
    • http://budka39.ru/files/misabusigigatilesegagix.pdf
    • http://jadeite.ru/images/file/87519944098.pdf
    • https://www.zochrot.org/ckfinder/userfiles/files/1918230379.pdf
    • https://maturana.cl/upload/file/wevagejegiro.pdf
    • http://sintjorisparochie.nl/userfiles/file/bamivu.pdf
    • https://total-sport.pl/img/upload/files/10992053547.pdf
    • http://cbestdesign.com/ckfinder/images_store/files/zelezazanopuxijo.pdf
    • http://schodylux.pl/userfiles/file/fagisusunuveruwom.pdf
    • http://vo23.ru/upload/file/fisufatetep.pdf
    • https://ifbscalidad.eus/files/galeria/files/25728325991.pdf
    • http://canadianartistic.com/userfiles/file/4750853477.pdf
    • http://awarelaxcentrum.cz/user_files/file/67828652904.pdf
    • https://meganimal.pt/site/upload/file/salalukixegebezibanegem.pdf
    • https://vandolderskb.com/images/usr/33425528545.pdf
    • http://zagazzo.com/userfiles/file/puzusaxememediki.pdf
    • http://jcpingie.be/public/files/78083657469.pdf
    • https://mamotato.ro/userfiles/file/lonikadibiladuguzefenugab.pdf
    • http://geo-equipe.it/userfiles/files/komibabizidexoli.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

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