Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e53b39179f632d…

MALICIOUS

PDF

77.1 KB Created: 2021-09-14 07:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: ee9c50caa55f6cc896028f7bd9ce3af2 SHA-1: 23ccf1e26d9223d7b59c9d34d7e13ea2665dcdc7 SHA-256: 69e53b39179f632d742b41755222f32ddf0664b3d46303dc417461b377dd4865
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://debseven.net/UserFiles/File/56327003049.pdf In PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/gizaje.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/dogamobamefedakafumopix.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/97589564212.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/wiboku.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/90959576400.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/mazevosigexo.pdfIn PDF document text
    • http://talesma.com/E/file/suwijebiwar.pdfIn PDF document text
    • http://mygrind.ie/userfiles/file/wutatojexemibit.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/40810077458.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/73688975387.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/juregumasepimufikofer.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/jojibomefebefutedewixuwu.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/xoxorux.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/08fef351fa9ea0cee31ff6e6caff2653/6870204237.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/23139130052.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/67800193947.pdfIn PDF document text
    • http://vaithun.net/upload/files/58885257393.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/1266995526613fcf79825ca.pdfIn PDF document text
    • http://mdtrend.hu/files/file/sufanabipawuwutejo.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/gigobovuje.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/h9tk8ihvevdct0rmes24gi0bf5/47137911769.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/4676529425.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/kegenulesisofase.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=hal+leonard+pdfPDF link annotation
    • 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_off0000caea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE301 10124 bytes
SHA-256: b742e4ea0a6fbfb76e99ee2250df1be1ab408935137d614e2f05744099a3fff7
font_02_sfnt_off0000f998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF998 17612 bytes
SHA-256: e18008af95a69c0061dea9710ca81125733797c9ac68685344fc1f1e3878fe49