Malicious PDF — malware analysis report

Static analysis result for SHA-256 46268089aabd2866…

MALICIOUS

PDF

84.6 KB Created: 2021-08-20 15:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fcda417db8145a5360bcb493e43e64d2 SHA-1: 2a7b98b5a2a2d04794a0d09991f6cedcba77cf35 SHA-256: 46268089aabd28661a118fb55015094ae422e8c7d72fb23f8a159e9b6e4b2619
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external PDF files hosted on potentially compromised or disposable domains. The primary goal appears to be directing users to malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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://fcksa.com/ckfinder/userfiles/files/xulujukugaxilarujelamo.pdf In PDF document text
    • https://capitalsyndic.com/userfiles/file/1858336504.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/tetofexokisebu.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609177a8e7aa3---rijimusamuse.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/kobajusovakilax.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c37ccf59539---85823488877.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/33369722979.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/wejevofikovuso.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/rtalmkljvklbhmshuokga02gu4/jivigazixaximibasawimolam.pdfIn PDF document text
    • http://starrsgazette.com/admin/images/file/pojasukugonuvulod.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/96896394794.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a4e80fb5f76e9a7c659210456d7f65b8/lumexededinurubepitu.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/79109455856.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fdd322e4032---vefibesa.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/94762363696.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/lisivefojufabubipebij.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/46537076868.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609cebcd59e7f---37243722438.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/89881482129.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ebf9272c3117beed6e35508725677469/timifagawa.pdfIn PDF document text
    • https://ikima.fr/uploads/file/89660411239.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd6c7e8966---95682212160.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/df7ccb01d2d74b66d7c3dc002723fbe2/86874365345.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16076d896af83c---lafifivozazofozadegoda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+reset+omron+blood+pressure+monitor+bp652PDF 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_off0000e444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE444 11132 bytes
SHA-256: b080d0c5a126936a84fa506cc174d810c2b901199f0ae5c3afe4c9835e94823e
font_01_sfnt_off0000fe11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 17920 bytes
SHA-256: ce76da88393152595b1cd57ee845aedf4e52a89289b625e710b7e55ffa638d1c
font_02_sfnt_off00012bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1