Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d63f13b31f8744…

MALICIOUS

PDF

80.7 KB Created: 2021-09-18 22:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 10f541c7f0b2121f4b28f81031a2a6ec SHA-1: 88baaa3de123bc352d98856cf8c3244211fe19de SHA-256: f7d63f13b31f8744721efabf9ba199483e748aa82b1109d55fca76ef2e9b1fd8
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier. A high-severity heuristic indicates the document attempts to trick users into executing commands by copying and pasting content, a common tactic for initial payload delivery. The presence of numerous embedded URLs, many pointing to suspicious domains, further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://gagiongvitgiong.com/ckfinder/userfiles/files/32852086237.pdf In PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/33233538097.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/dusamivudesumuf.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/gitizevufiwinovosutewax.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/7c2d660de55f72c8feb5d901bc7354d4/37765440585.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/bigijeniwake.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/welezefafefore.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/dovalapojibu.pdfIn PDF document text
    • https://pgprojekt.pl/Upload/file/99890258054.pdfIn PDF document text
    • https://zlataraburmevuckovic.com/files/toxonamawuladikiwutil.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2febfaa00c751e4b5a3393b6dbde84f5/31788836497.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/22722125910.pdfIn PDF document text
    • http://negaratoto.com/contents/files/gomigowodutogilako.pdfIn PDF document text
    • http://polletnv.be/uploads/files/74147730547.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/sogipuk.pdfIn PDF document text
    • https://mimpiindah1.com/contents/files/megoxejiwitevemudig.pdfIn PDF document text
    • https://keluargamimpi2.com/contents/files/52268935428.pdfIn PDF document text
    • https://zagi.hr/files/38632351989.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb96308abb---senirirekerad.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/melete.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/viziwob.pdfIn PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/fotixajowirepuboduxiwudow.pdfIn PDF document text
    • http://npas.ru/pic/file/tulabewa.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/1736455675.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/3320307021.pdfIn PDF document text
    • http://managhantasala.net/mailuserfiles/file/59190324517.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/96698851353.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=rom+htc+desire+cPDF link annotation
    • 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_off0000d7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF6 17856 bytes
SHA-256: c570c84a4becc736c38669ec9226504f67f29689b19bbcfde809bfddcb65fc02
font_02_sfnt_off00011e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E38 10368 bytes
SHA-256: dca06795e3b3b978ae132d5169e0d54b3c8f88f2d47bbf2a68f4546119b41abf