Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8f55be926f9c21…

MALICIOUS

PDF

70.6 KB Created: 2021-09-11 14:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ff91240bc7e0a222a22c50fb4495096d SHA-1: d2d9ea7b4476631c4e59a673181f37086cfd6e37 SHA-256: 6e8f55be926f9c210eaf58e5cff72c55efad6d6b52401681af09d5bcfcce6715
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to potentially disposable domains, suggests a link farm or phishing lure. The ML classifier also indicated a high probability of maliciousness. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6367

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://halkapsikoloji.com/userfiles/file/34655007833.pdf In PDF document text
    • http://wabasnb.com/files/fckeditor/file/183507866161325260ae1eb.pdfIn PDF document text
    • http://yljczl.com/uploadfile/2021091103133162.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/36362875812.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/tevupaxugadabogefi.pdfIn PDF document text
    • https://gdwtechnology.com/fckeditor/file/In PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/fajiludower.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/50461565693.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/46668083119.pdfIn PDF document text
    • http://mocphatreal.com/assets/images/ckfinder/files/luvodifax.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c835a3bfa---ladepekugekij.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/72964969167.pdfIn PDF document text
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/53542728025.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/falefigo.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/70890731088.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/vajibokenavijubojuki.pdfIn PDF document text
    • http://haitrungkim.vn/uploads/userfiles/file/zikonotazitilexagujufiwo.pdfIn PDF document text
    • https://biomisszio.hu/tmp/97935613537.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/novevifuneba.pdfIn PDF document text
    • http://jfe.hk/userfiles/76124239887.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/lopapoluseguwenu.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/78609070761.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/53952578952.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/gedodonelimad.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/58101150902.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=little+big+city+androidPDF link annotation
    • 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_off0000b3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F1 10588 bytes
SHA-256: bb68acc8d24e1ff3e5cb4e508e949bb36f098d81418592e638ccaf575cb01edf
font_01_sfnt_off0000cc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE416 16244 bytes
SHA-256: febf3da6e336ac9c9a0af7a9d3427040c86ce95ce78e3f9ff29868c1a47ad5a1

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