Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f105183b666504…

MALICIOUS

PDF

70.6 KB Created: 2021-09-26 16:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1a2a86c631f3faf610a120f9c0ec4c20 SHA-1: 96b827101396561eccc5c81cc00de688014bdfb9 SHA-256: 82f105183b6665043bbba0e2d08f12018e151867c141ae49b2bfc195019d7f87
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and the 'SE_REMOTE_SUPPORT_LURE' heuristic suggest a phishing or social engineering attempt. The document likely aims to trick the user into downloading a malicious payload, potentially disguised as a remote support tool or a game download, as indicated by the URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://garglob.ru/uplcv?utm_term=www2k19+game+download PDF link annotation
    • https://nieruchomosciprzetargi.pl/files/file/95592510728.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/68809836273.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/43938226116.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/mulanofozufinolub.pdfIn PDF document text
    • http://delifarm.com/images/file/belew.pdfIn PDF document text
    • http://altera.ukrstroyka.com/content/xuploadimages/file/nogigapobazizadabak.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/35783433135.pdfIn PDF document text
    • https://otterdisplay.com/userfiles/file/17434993589.pdfIn PDF document text
    • https://blokhol.com/upload/files/fidevikidijuruze.pdfIn PDF document text
    • http://snbedu.com/uploadfile/file///2021090905525619.pdfIn PDF document text
    • https://birudongker.com/contents/files/tivukurojirazetowovavog.pdfIn PDF document text
    • http://motopujcovnateplice.cz/userfiles/file/12888847799.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f35001741e---75864382330.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1614e248da497d---60698643491.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/2e705d2a24733cd315b5313a8815b113/77736285412.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/16214540829.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/pidabagigef.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202109110427106867.pdfIn PDF document text
    • http://ktcz.eu/files/files/65306965679.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/33124830828.pdfIn PDF document text
    • http://kebirbeton.com/userfiles/file/37165563226.pdfIn PDF document text
    • https://kaemsp.org/upload/editor/file/xebugetixikopaketi.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/1946832939.pdfIn PDF document text
    • http://ellev.fr/upload/files/guvuxexupamomakiv.pdfIn PDF document text
    • http://firsttimehomebuyerstudy.com/images/file/xamujalufo.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/50213961414.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_off0000b131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB131 16312 bytes
SHA-256: b3547c86ae9b1cb6e26988607de0b3b4a792c443314e16e34b974462266b7ee4
font_01_sfnt_off0000dab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C9 10644 bytes
SHA-256: cd1953c3c613c10b8bbbccf335a352ce859f4611b616d9acf4b7a57200898d3e