Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe407d2e73c1832…

MALICIOUS

PDF

89.0 KB Created: 2021-09-18 12:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9285814270ba72e6e99aecf5c468458d SHA-1: 0d84e960684df83695673b611e6a499fce67e1a4 SHA-256: efe407d2e73c18325aa4656fe0db15f14afc50b1d5b96012dc004d2f6cfa8cb0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing lure. The document body was unreadable, but the presence of numerous URLs pointing to compromised CMS uploads and disposable hosting, combined with the 'SE_MFA_LURE' heuristic, strongly suggests a phishing attempt. The goal is likely to harvest credentials or session tokens by impersonating a security verification process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cructi.ru/uplcv?utm_term=how+can+run+android+apps+on+pc PDF link annotation
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410b0c52e97---68008249072.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/gotajolomoriwaludob.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/xadebutatifokorisi.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/60891896879.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/ced57a4a3042238298ad322357be892f/detutepidekizulajeridoga.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/18783047746.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/f4b59cf3552efa8d6ba28b42ed1ddf6a/24489218306.pdfIn PDF document text
    • https://path.mn/userfiles/files/vusuwuwabamegatuwiganon.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/dajasufetiw.pdfIn PDF document text
    • https://tallerescarrion.com/uploads/file/8060425205.pdfIn PDF document text
    • http://kunmobile.vn/files/uploaded/20210909/file/busovazilo.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/97vlkdkphrbobl74njme7k1esj/49939878490.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/vogojozakalilinelivub.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408ae6306e3---dujozu.pdfIn PDF document text
    • http://satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/22878771567.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/49026475645.pdfIn PDF document text
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/82826442920.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/zoxavowozak.pdfIn PDF document text
    • https://wojczak.pl/userfiles/file/zojikafumi.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109070105016458.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/oh1k1q78qt28g7v0r24s5k5eqd/foxabejosegifiguzuwej.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/majolamonawepi.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/20464242994.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_off0000f97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97F 10408 bytes
SHA-256: 950e5f99de9841e0bf4ec385d5ffc2cd31341e20cb3271ffa648b0bc05254dd9
font_01_sfnt_off00011126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11126 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12938 17236 bytes
SHA-256: df5b8ff7b0dea2ba697da188a5be61ec0c178259d2f31772f9a5baf6e2715ad5

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