Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e869da7cc967f8…

MALICIOUS

PDF

81.2 KB Created: 2021-09-22 19:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 44ce3f6040bd92c8f2feacc0ba90aaf5 SHA-1: f0b590d3fc68d6e64eefc7959a07930339b7311e SHA-256: 26e869da7cc967f8e3a5894bd925b06bd11a32149c186fdea418064ef8cf079f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document functions as a link farm, containing numerous embedded URLs pointing to external domains, many of which are hosted on disposable domains. The primary purpose appears to be directing users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=what+is+the+collective+noun+of+old+stamps PDF link annotation
    • http://csc0516.com/userfiles/file/20210917092158_cbs7g1.pdfIn PDF document text
    • http://dreamsurgeryen.net/ckupload/files/dimewoka.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/gefopiwevixaja.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/lebavutezew.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/nubojirigekepinadeneriva.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614b505a342f0---73000891086.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/zekorodilanowezoguxujaxuf.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/57003646733.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/7671ff7a8a89e9151b67fe21fa527ae7/rirajetak.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210916_E4EF596D2F2444D8.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/58947060235.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/sigomoruxukalozakogek.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/kevuxemitajufag.pdfIn PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/bitekazoxijimulalimaro.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/gapezivoz.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/wonudovid.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/tevanigavuluki.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/luzisanafotaxuga.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/93272325359.pdfIn PDF document text
    • http://shangyi-pump.com/uploads/file/022203325098.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/78343418299.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/lodezejamovabut.pdfIn PDF document text
    • https://b2bircruise.travflex.com/bot/ckfinder/uf/files/72011124519.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_off0000d84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05F 17476 bytes
SHA-256: 769939f6f7a3c4af4e99ff53014ed9150e536dabfcd5b2965071aea1f9609b9f
font_02_sfnt_off00011dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC3 10944 bytes
SHA-256: 6ba3b0e544d57c25fa659cd65ed57d209001c49d7988c334a59373f510873075

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