Malicious PDF — malware analysis report

Static analysis result for SHA-256 588e6fc92771d37e…

MALICIOUS

PDF

83.7 KB Created: 2021-09-18 00:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 55456ddd874974020cff9d016e551eb5 SHA-1: 4d4e7241323a545cd317d7b930d61b7ae8efea58 SHA-256: 588e6fc92771d37e640fa714c90ee1fc1d5e421dff2f7d84692343131af5c23b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, with specific heuristics indicating it functions as a link farm on disposable hosting. It contains numerous external URIs pointing to potentially malicious content, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest an intent to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://drafthe.ru/uplcv?utm_term=how+to+completely+remove+app+data+from+android PDF link annotation
    • http://citranco.com/users/files/nefosibaze.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/liwalogojikejexirilu.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/pubiwavuxulibigitaliwimar.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/kopokererejoso.pdfIn PDF document text
    • http://minerva-collection.net/files/files/sefopagezovegegoresejuto.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/42441657554.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/febojovizaxifanesatesemut.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/94416585338.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/vamuvigowatijelepa.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/bijudapozekemogegenoxigos.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/83432474883.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/fudepelubu.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/donenuko.pdfIn PDF document text
    • https://jmclimatizacionhvac.cl/images/subidas/file/nugotevalo.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/wavoxoxi.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/fowugonozikamem.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/miir3ui6nivh3ealggp0fah7tc/xeralifigu.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/71569779572.pdfIn PDF document text
    • http://cbstav.cz/file/42110717424.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/nofutadobupagezadal.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/lamaxumibidadake.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec61da1a97---wunabajupinewanena.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/vufumumiwiduxunilobe.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_off0000e366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE366 17228 bytes
SHA-256: ca2c14d50db2d1903d1c511bb83e2a9a268bcb2632c82420db6a2cba676cf255
font_01_sfnt_off00010fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C4 10868 bytes
SHA-256: 21e3e33a7676905a5c2c19a076007935efca18c1b60c9c79de3e64fd2dd21fb6

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