Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6e3f7b6be5bf93…

MALICIOUS

PDF

68.2 KB Created: 2021-09-19 19:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: dffec37a2f30e57397b15eb6f1aad453 SHA-1: 16546f2e8f47b8affbf64171d548235f2920e82d SHA-256: 3d6e3f7b6be5bf937dbc4326d178c287b60a0d4652268bb00a43341367e48e9c
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm. ClamAV detected this file as a phishing trojan. The presence of external URIs and the overall structure suggest the PDF is intended to redirect users to malicious websites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

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://crysiq.ru/uplcv?utm_term=to+kill+a+mockingbird+chapter+1+pdf PDF link annotation
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/pafanavefozap.pdfIn PDF document text
    • http://gardatrans.com/content/Files/85679623175.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/keluledisanovaxon.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/91594219085.pdfIn PDF document text
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/deladefuziv.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/tujuwesixopiwikijaxola.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/panaw.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210919_24D33ABCE0DA20EA.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/51720043803.pdfIn PDF document text
    • https://coherence.cz/userfiles/file/fodizeteralojumudigegita.pdfIn PDF document text
    • http://lachina.cn/upload/file/tomulizew.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/pepolefirekinuvidufa.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/16488416966.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/7ab037e49cbbdadd0dd3691828ccc94c.pdfIn PDF document text
    • http://traktor-tv.de/sites/default/files/file/sizuzojuwepukajojot.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/17325489043.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/0gvrshlusrk48fm88s1c81h5u4/xunozapiru.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/59966443596.pdfIn PDF document text
    • http://piscesappliances.com/userfiles/file/jegixisawejapes.pdfIn PDF document text
    • http://adbuilder.at/ckfinder/userfiles/files/77379130984.pdfIn PDF document text
    • https://acmfashion.vn/uploads/files/nigagifu.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142c456623be---sopajuganokodedowibibete.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/11342566969.pdfIn PDF document text
    • http://innersolutions-uk.com/file/67880669952.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_off0000ce19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE19 15952 bytes
SHA-256: 4a0e2c1a3f826a12c57c2b9988a093ea3881d6e707e4995b74b52b7ee1511493
font_01_sfnt_off0000f6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C4 11144 bytes
SHA-256: 9c4ec5e25f5875f166c115322b92951fcb9282353e9be16e90d5c13f49b885d2