Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4ef6644a8a0fd4…

MALICIOUS

PDF

69.2 KB Created: 2021-09-28 08:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 005961948eddbe90e6e5281eece4dbea SHA-1: cb84ae368b8d9684b690088f7fd5834e62325056 SHA-256: 7e4ef6644a8a0fd41c318c353ec9117d6e2071eb9040a1cdb12caa22cc272487
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a likely attempt to redirect users to malicious sites. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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
  • 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://wastran.ru/uplcv?utm_term=in+into+you+lyrics PDF link annotation
    • http://autoescuelatosal.com/galeria/files/48508869585.pdfIn PDF document text
    • https://dichvuketoansg.com/luutru/files/79551285879.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/vumufidi.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/95080550467.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/wadiwogogeteworebotuwobof.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/37297627392.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613701b3f09fd---79467399647.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/vefaxipuwoter.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/78721570795.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/26279516003.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/99780445292.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/xazedomijumogi.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/ripugugizakuputafuzujitex.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/sdjehuvdrob5tu7bp7no8806l7/86248119704.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/rajiguxada.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/67942394367.pdfIn PDF document text
    • http://nova-auto.com/upload/923720389.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/metonavelizafoj.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/62657215087.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/51338870478.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/27251225859.pdfIn PDF document text
    • http://partiaweb.com/upload/files/66027711756.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/jemopitaki.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/8438153131.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/91919696506.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_off0000b300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB300 15304 bytes
SHA-256: ccbb4269e730954f715e90f856889ab718995e09728a5e868caf7cd1f484c34f
font_01_sfnt_off0000d8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A2 10092 bytes
SHA-256: 2940e02c3aa9ba7b328d2bc8395d988529d95fd08f681dc22a5f7c0ee214c426
font_02_sfnt_off0000ef4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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