Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d665f8246a08be6…

MALICIOUS

PDF

80.8 KB Created: 2021-10-18 05:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 21cdffa89371216aa51c700cf1934b42 SHA-1: 7385532b6608311d4a57f14eb6eaf29b6d97ec22 SHA-256: 6d665f8246a08be6cab62feff9a0882d1de16f79f68bef63f2a44a3bb6971ab0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, many of which appear to be link farms or disposable hosting, indicating a probable phishing or malware distribution scheme. The document body is heavily obfuscated and appears to be generated content rather than user-readable text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://allytemp.ru/uplcv?utm_term=how+many+covalent+bonds+does+oxygen+have PDF link annotation
    • https://inwestorfinanse.pl/userfiles/file/tisapu.pdfIn PDF document text
    • https://ladachess.ru/userfiles/file/guwadevademesipi.pdfIn PDF document text
    • https://tdfstore.it/file/4154947557.pdfIn PDF document text
    • https://www.food-equipment-store.com/fckeditor/uploads/file/matimedusokuvorukekomax.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/guliwuwuvazokukipi.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/90423766400.pdfIn PDF document text
    • http://deleeuwputten.nl/site/data/ws/files/xozapol.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/nekojuvikobap.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/nadulubod.pdfIn PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/jaturizejemulobekefugoza.pdfIn PDF document text
    • https://geelaboba.dswip.com/ci/userfiles/files/54620338342.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/76746538007.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-10-10/20211010105228903185.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/23583780183.pdfIn PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/xadajuvinixomavovov.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/zepeteziladidog.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/lifilalututegujotanuk.pdfIn PDF document text
    • http://stmarysharipad.com/userfiles/file/divizej.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/rimodozipafinozuked.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614032215d56e---24568314326.pdfIn PDF document text
    • http://kowalstwwo.pl/public/cms/images/file/18253158429.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/83321051946.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_off0000d65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65F 17892 bytes
SHA-256: af9260eda60ffd9a26e8b7e6fa92c425e18a832ff876891d710d3b82e143ce83
font_01_sfnt_off0001037c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B93 11124 bytes
SHA-256: d4c191bef12752f011a88212630f551eec72a1ab72cba6c440bfbcd2b0eadc5a

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