Malicious PDF — malware analysis report

Static analysis result for SHA-256 612d7edb0a1ee46f…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 11:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4838ab3a9cd8b9c3d879baecebf6ad35 SHA-1: 61cb12c98b0b846eea5e54620899f53da2088297 SHA-256: 612d7edb0a1ee46fb47f161589ad378373947bc78ac1ce8181d6282d2146676a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised websites hosted on disposable domains. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/68d7c22173de1db9895fd57826e9e7eb/69509241619.pdf In PDF document text
    • https://nakshistudio.com/ckfinder/userfiles/files/39268727372.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/mexedidazesudaxisomivifig.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081fe2e051c1---xolirojibakidovimat.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/1164428815.pdfIn PDF document text
    • http://centrumbiznesurawicz.pl/userfiles/file/878116034.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb23f85458f---jabasisigabemifiroz.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/dusitoraguxesevixoniju.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/3361507147.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/notujisasonir.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df5251ea92d---nogamanoze.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/ziwetojonivikarevu.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160936bc8baed7---83528203862.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/49238305366.pdfIn PDF document text
    • http://diodelumi.com/ckfinder/userfiles/files/46814716023.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/dojanavevikunosunoxepi.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/32659160466.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108630855a96---rixaki.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/na8jrfgboaodr2cb47stmh0p9n/55758864856.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/vobovobabezoxek.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/75524796771.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210703233239.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/75649555976.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16112b5197d7ea---49746066635.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=2020+feast+of+trumpetsPDF 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_off0000e95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001016c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016C 17492 bytes
SHA-256: a196e7e3d8ef138204ea84ef595417386d9aff9f14f4e48515b30dd7698331a1
font_02_sfnt_off00012ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED0 10524 bytes
SHA-256: f6320f59fc416a5c03d887b5eeb5f9de998d300ed007df2365a57fad6def44b3

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