Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2bac66d4112fee…

MALICIOUS

PDF

68.1 KB Created: 2021-09-14 07:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9c5eba18dedc24d1c1b63fbc9b9b9b4c SHA-1: 4fcb56f18d423bc1c6016768d80c2d1750d5d326 SHA-256: 3d2bac66d4112fee7991879a0752a573b82b59e4d627107083734a28876aa0db
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The numerous embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong intent to redirect users to potentially malicious external sites. The ML classifier also provided a high confidence score for maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6939

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://crewmak.ru/uplcv?utm_term=bendy+and+the+ink+machine+apk+mobile PDF link annotation
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/35679830124.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/42313685793.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/71168201406.pdfIn PDF document text
    • http://ativn.com/upload/file/32737837680.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/verutolefadosobu.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/8430328109.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134c72abb7c0---vodafelumaxajew.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/tepija.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/giriduxubitoxepaxi.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/gerelaxanuxakupisa.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/1070dee084e88ac8bd248e725a943dea/kugafijaxeduke.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/libitelegudud.pdfIn PDF document text
    • https://kristinanamaste.eu/files/medavexunokisem.pdfIn PDF document text
    • http://df-2.de/images/daten/file/suzexibovinewonurebezufe.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/99836234498.pdfIn PDF document text
    • http://sjzhtchem.com/upload/files/sejigowamefofivow.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/tudop.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/wugunudozopurajozujixux.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/todewapetuteja.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202109080348558956.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/76370997385.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/mogedixanomufe.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_off0000e0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FD 10912 bytes
SHA-256: 7f1246bd42452394676a02a40de180a9640f4e729f293173b3b7cfc46d98ea07

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