Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd4e3b0e605daac7…

MALICIOUS

PDF

67.9 KB Created: 2021-09-26 00:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b45da052adfc38528dff56df815b8840 SHA-1: cad84a8518b5e8725535f63c4437fca14a99be6b SHA-256: cd4e3b0e605daac7267807fc9cef1ae5c4e3ca00cd20e4e3f9d3c6ccfb051123
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to malicious websites. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggests a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the redirection or exploitation process, contributing to the overall malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ketchas.ru/uplcv?utm_term=virtual+router+android PDF link annotation
    • http://nyett.hk/uploads/news/files/44584935060.pdfIn PDF document text
    • http://unleadedcoffee.cz/soubory/31251656961.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/radipizagufoxabiretufowal.pdfIn PDF document text
    • http://geasit.it/userfiles/files/kirolob.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/1048056788.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16137bc1fb0e45---xujonapobopomewufipabene.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/wimudomojasekadibamarabov.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/25053413191.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/98748533773.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/14854953872.pdfIn PDF document text
    • https://actorconseil.com/files/file/45603059932.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///13001539643.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/94431214715.pdfIn PDF document text
    • https://fond.ru/userfiles/file/41598671084.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210906_B0106C462590A017.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/dizov.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/45869891595.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/55424864244.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/mutivase.pdfIn PDF document text
    • https://promise-land.com/upload/file/gesadez.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/nitazufipazomam.pdfIn PDF document text
    • https://www.nhabe.com.vn/ckfinder/userfiles/files/11898631828.pdfIn PDF document text
    • https://www.barefoothoa.com/webroot/js/ckfinder/userfiles/files/tudaderubo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000ae0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC623 10140 bytes
SHA-256: 6c90319765b9b9cc70c2d149862fe6388a176f2923157374fe7885748f502916
font_02_sfnt_off0000dce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE0 14932 bytes
SHA-256: b0cc57c2f184d3199f6fa85f8aecc8d4147f5944c35109f67180bcdb4b013686

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