Malicious PDF — malware analysis report

Static analysis result for SHA-256 e521a626641a5796…

MALICIOUS

PDF

90.9 KB Created: 2021-06-29 14:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 21319124b0435b5717a66c9de69007ef SHA-1: 3f369b95559ba4feeacb34e62e6afeb91f4bfb02 SHA-256: e521a626641a579669b1d4f47cdb09c251cf818f7433169d88cc3f5526438fd6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is classified as malicious by ClamAV and exhibits characteristics of an advance-fee scam. It contains numerous links pointing to compromised WordPress sites and disposable hosting, likely intended to redirect the user to malicious content or phishing pages. The document's structure and embedded URLs strongly suggest a social engineering attempt to trick users into visiting external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=nobody+is+indispensable
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/61tn9ohcudns5ficuvbo36fbvf/4989705396.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160838f020907f---rapezaragodajigokuwizerum.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cb2c1cc9f---wuwogidapaxuw.pdf
    • http://zrdb-drogbud.pl/Upload/file/lalitasanilumowexutuzemo.pdf
    • http://angarakshaksecurity.com/userfiles/file/4056727278.pdf
    • http://tantex.org/tantex/tantexuserfiles/file/15394013094.pdf
    • http://videofilm-tv.ru/content/File/titewovawonun.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f94bd0baa6---gobofebezosujomomumolepu.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a369472a6b5---39197946156.pdf
    • https://tvmreza.tv/ckfinder/userfiles/files/rerulefuk.pdf
    • http://www.chatanakonci.cz/userfiles/file/83601053108.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2809de877---12405196450.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63fa1d2b26---39681943708.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/7114c3fefd337c6de8034b75704a619b/81978767628.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/1kdmetmduqmho1mf1gg3hgjl27/43325779228.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea6f981f24---xaxunopegemalu.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/48fkkapseov768ih0pgfvguq17/lemogexetosojevixufavuget.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e586cd1469---77722439391.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/fa9c8651c6f614eb2d4be7e6cf2b39bf/buvefapibugutuvajef.pdf
    • https://tavio.ru/files/file/9864519341.pdf
    • https://xehowo24h.com/images/ckeditor/files/dixonojewunonusixafa.pdf
    • https://olympicwroclaw.pl/zdjecia/fck/file/gegubuwi.pdf
    • http://ikhmongol.mn/ckfinder/userfiles/files/23572866985.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607862bef0524---18175052710.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac6301e579---21244341462.pdf
    • https://bataretak.com/img/files/file/25286537057.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe0e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0E 16792 bytes
font_01_sfnt_off00011620.bin
df715dd78f1eb55e13c64c7607bd041313c5bead254fe6313a664e2d09b60cfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11620 18096 bytes
font_02_sfnt_off0001455f.bin
5bdff6c593b306bdfbe1decc4a4b496cf20f37e7a66a37e4f71792181b4cc0b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1455F 10420 bytes