Malicious PDF — malware analysis report

Static analysis result for SHA-256 95588cef8177601e…

MALICIOUS

PDF

87.9 KB Created: 2021-07-01 15:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e4fcfd7183cf27c8bbc7dc1d4311eb80 SHA-1: fd30af870005bd4910c38635e7946fe2e71553c9 SHA-256: 95588cef8177601e25af1a56ce4d90eb242b29df5368ff0de7dbe77b6152dbb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be directing users to external resources, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b18358d33---refizitosozuve.pdf
    • http://global-leasing-management.com/uf/file/14930381449.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/ccb2c5a814103173aa8afb8037513d0d/52424720050.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2105a6b6a---rofojoki.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/1a5a753edb2ea0f7239c3da482c1fcac/82380089250.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160985e37609bc---83766285670.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/can05g86ejn45gfi2tussd0vs3/41666488862.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/8185c0b3afad7a8bae2b73b68a7bedb4/61607684759.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b81a1d56c62---78247711568.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/872d0eb2c64c836004bea02d497e68ff/zelibetopigizamob.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c77797c943---79035747340.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/n0neojoh95v92405pno8kvuaf3/30878928640.pdf
    • http://cloverpark1959.com/clients/51168/File/34474076961.pdf
    • http://nadiadsa.org/userfiles/file/35260032956.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/98c5832e4f6651d4bc473028ef99b49d/kidavukifutubaneranoxazu.pdf
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/35519704989.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/2145bf2dec5916def49b58eb6a7128ef/jedisudezoz.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8dbc6346b---36760171732.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c4966d6d7---xuzepubutazukosowakorofo.pdf
    • https://dodatkireklamowe.pl/web/uploads/files/26121806448.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094125460798---dibupijakirowerugolepafux.pdf
    • http://scales-center.com/shop/fck_file/file/bivobagenabunelitejovajux.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607033f89eb4e---47480193429.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/5sjusofba4575v2shn6795ls53/kosepikamug.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c2a329713---fanamokojefodolisi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=video+recording+software+free+download+for+windows+10
    • 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_off0000f54f.bin
1105de49e2b463085bbc4021c99dd8c05e11b4fb73cbac1d37b106290af6e7c4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF54F 10880 bytes
font_01_sfnt_off00010e77.bin
0df1a2735bc6ecbf0dc3ddddcb1a221a0796ea2ad16b8458ca83453e30ca8b77
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E77 16696 bytes
font_02_sfnt_off000139ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x139CE 16792 bytes