Malicious PDF — malware analysis report

Static analysis result for SHA-256 871868e3e84e3450…

MALICIOUS

PDF

88.7 KB Created: 2021-06-26 14:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 13047a44ffb1fae5d314784aa187def3 SHA-1: d6420e55cf2cbc4cac1641ffc97926a9cb628fe4 SHA-256: 871868e3e84e345038526d7d5c86a2da0bc1f472458a7ba604dcce0c9c66d614
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or redirection attack.

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d092d45f7f7---77876609716.pdf
    • http://tipsclubcr.com/campannas/file/falipalozixulejetat.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9854749998---sedipodotuwolajejetifokab.pdf
    • http://blatt-gruen.ch/files/6793068958.pdf
    • http://mistral-paints.cz/userfiles/files/dutonidorenubomunufobazi.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/nebtk0tl2qt9lujtivgit5ipl5/disuselesosagojulogupox.pdf
    • https://sportsht.com/userfiles/file/37187903530.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/2rldnkpub29qtqs2b1m5tadr87/kanemujo.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/fe7871483d9a28e0eb93368c7c68a9fa/26436932682.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc594cba11---6815634677.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16078eeaf72070---sobokofizorokux.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb520dd3c4---36644805724.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964dec7cacf---21627121056.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834e07c0138---jusojoxaloxupopuguduna.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/ea84f43ef1c3d50b80c467536b568806/48373602411.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/d5df262a4b96dc7cd2495c081701d5d1/48002348329.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/deddb31c310c56003969014f7f818df0/73497955699.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d00f279e7f---jegilikazatobuzotasaxojem.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/23303804c4d9a74626d98b4d65a239e4/lexerepixevenufa.pdf
    • http://asiadomainstore.com/userfiles/file/1645332006.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/jbdu8n3oqh3pblis7ms8snk2n1/24858362774.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/c075b49d5a4c253775b292053497d640/vosofuga.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b15ad2c029f---fomononuzo.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/1ccgcojbua7dosnib3bvterk03/97254830209.pdf
    • http://sibinetweek.ru/userfiles/file/83615090725.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/e466fca584cfc554cbc8217839568a87/17118501700.pdf
    • http://www.jcca.co.in/wp-content/plugins/fo
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=formal+curly+hairstyles
    • 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_off0000f6da.bin
922b98df1b6aed09c74a4d7d5a673a2f558d44e22aa95f473f428d49a1fb56e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DA 10584 bytes
font_01_sfnt_off00010f0d.bin
96f9df65d3d127e896337822bf76d3bee96b7952923cbeb32b73f3cceb185f26
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0D 17636 bytes
font_02_sfnt_off00013d78.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D78 16792 bytes