Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23d70b85d1fd31c…

MALICIOUS

PDF

81.8 KB Created: 2021-09-19 13:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8d80bae92c298c7c432eebecbf7b44fa SHA-1: 523d4d038ab3c5e5a070360b84c3315e88c9eb85 SHA-256: d23d70b85d1fd31c13cf2ecc49075e891fec41e17e4a50778221b43084bdd3d9
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs that function as a link farm, directing users to external sites, some of which are hosted on compromised CMS platforms or disposable hosting. The primary function appears to be redirecting users to potentially harmful content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://chcial.ru/uplcv?utm_term=smith+wigglesworth+on+the+holy+spirit+pdf+free+download PDF link annotation
    • http://urbancollab.com/userfiles/Proj_Name/files/nagosomotenadirugazux.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/74015987156.pdfIn PDF document text
    • http://zenkatsu.dk/files/80934451960.pdfIn PDF document text
    • http://neuchina.org/userfiles/file/tixexewidetuvekor.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/mirum.pdfIn PDF document text
    • http://raczcsalad.hu/files/pojomadabukut.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/ketudajifawugowisox.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/98810902517.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/c7f0c4c4ed05bfd218119c0a70739192/14076044695.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139270b069de---65809393312.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16144069ebe835---62636641863.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/latobagalenubanesomupemap.pdfIn PDF document text
    • https://tlkingatlan.hu/kepek/other/file/rimunapi.pdfIn PDF document text
    • https://forumsevens.com/images/file/34224671967.pdfIn PDF document text
    • http://directopinion.biz/uploads/FCK_files/file/68829185259.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/jevebigixibarijanevul.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/tujokosobegiwivafusexaje.pdfIn PDF document text
    • http://espressobuilders.com/app/webroot/files/userfiles/files/benuxanapajenapemaso.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/28269796730.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/39088194201.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/78160867224.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/makorobubate.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/dejeribefebixur.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/80343759455.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_off0000d858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD858 11220 bytes
SHA-256: b40af08cd772818c01cab5bf4e7212b1c189f8239f35b60dc7fee5db188503df
font_01_sfnt_off0000f245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF245 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A57 17680 bytes
SHA-256: 5076a845468cc6e3095b8dc4ffb89180248124f70211ec91344fed70a21dd88d

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