Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce6450f169adf41…

MALICIOUS

PDF

76.0 KB Created: 2021-09-21 02:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8a3a840f40b28750ea413e435c640432 SHA-1: 92b8a2982f71623e63c18c7f5661b1c883a2927a SHA-256: 7ce6450f169adf41617624bdc938529428263fbf99b34155df6a7d12c6f830bb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple external PDF files hosted on various websites, some of which are identified as compromised CMS uploads. This suggests the PDF is likely a lure to redirect users to malicious content or download further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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.
  • 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 http://yonezawanet.jp/units/24250/zcycom/files/roxobejiwukat.pdf In PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/d02d06ecb0f7dedbbec385527cebcc7c/pinimezipadusekati.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/12620931643.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/28322639939.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/vikotufup.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614093f1cffa1---77771733292.pdfIn PDF document text
    • http://flapboxes.com/userfiles/files/96563348659.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/foxabiwevolag.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/27228045121.pdfIn PDF document text
    • http://fruitvita.com/files/files/87447258837.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/54130586716.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/pibuwanakamebix.pdfIn PDF document text
    • http://a899.net/userfiles/file/rolewinox.pdfIn PDF document text
    • http://4bzsoftware.com/Images_upload/files/fafegufexolufomemogowa.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/e1ce83d11f5cf413698a27fa3ef40b92/divalavaf.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161390ff67d38d---69683124447.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161375190d7d07---janekanu.pdfIn PDF document text
    • https://pactforfamilies.org/ckfinder/userfiles/files/72616833462.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/69262767239.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/66416167897.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/3f7c4a857194f5ec8a2301fe131c603d/91579291588.pdfIn PDF document text
    • https://casadko.fr/userfiles/file/rufotajinafixodobetogej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=backgammon+free+download+for+androidPDF 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_off0000c369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC369 10784 bytes
SHA-256: 6902b5451353fdec89a3795adc3125b827e9a7e2b51f5e3e85a2d35ddf5db6b5
font_01_sfnt_off0000dc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC17 17784 bytes
SHA-256: aa68c8fb2c7e21507e84b1186ebea3f48b041a3a193db2e4943eb94cad5a8914
font_02_sfnt_off00010a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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