Malicious PDF — malware analysis report

Static analysis result for SHA-256 9958b384da216534…

MALICIOUS

PDF

86.2 KB Created: 2021-09-18 13:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9c6fddb9121b2975d988a7cd546db6d7 SHA-1: 7c8f43277a8595434811f0724990409db99cd0dd SHA-256: 9958b384da216534db116dd8f9fa443ca3a38583d17dd9da1b3953ee111e877f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to phishing or malware distribution sites. The presence of external URIs and link farms indicates an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://oniceh.ru/uplcv?utm_term=download+the+kissing+booth+full+movie+with+english+subtitles PDF link annotation
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/e8308f8237975e2c6af32aaef0306db5/8400162174.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/a0e31d88aefc711be13123329fb34211/sasewiwedajisegekum.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/80065150094.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/fegagilokufifatadofi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffd324889c---wuwitojuverut.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109042020159905.pdfIn PDF document text
    • https://eternalbliss.net/file/2308562926.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e6cf2cbaf---nosowimatozogof.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/88675779882.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/tejorasefutaxupa.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/83116738582.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/lavewuwumuvosuxozakugu.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/fexudozozudezapalamuvorap.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/65273248423.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/11156616724.pdfIn PDF document text
    • https://dm288.rs/slicice/file/foxexuxab.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/9212970322.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/55761280950.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/3024702023.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/dopumaguxox.pdfIn PDF document text
    • http://metabolit.ru/files/file/44189886143.pdfIn PDF document text
    • http://moje-stranky.eu/userfiles/file/99799626672.pdfIn PDF document text
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/85264781756.pdfIn PDF document text
    • https://www.savininkai.lt/ckfinder/userfiles/files/roduvilimakit.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_off0000e8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10110 18288 bytes
SHA-256: 866e9fbece3f932f9747690357a009fe6c836387ff50f6fff0ff7219c0d6a0e4
font_02_sfnt_off000130a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A7 11184 bytes
SHA-256: 4257b5559cfe3557f1094d389abe8f8c8a744b654e250839a92d12bd5feaaff4