Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7b90e255790dfc…

MALICIOUS

PDF

112.0 KB Created: 2021-06-30 11:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 02d596f603fd4a05c1ee5c812cf8712a SHA-1: cf3dd0e27fb7aeb425e79eaf1ee8de7269396e08 SHA-256: 9c7b90e255790dfc297868f89a315ff9d22ad10bc11f3f39bf9e372ececd7985
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised WordPress sites, likely to host or redirect to malicious content. The presence of numerous distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the final destination and potentially leverage SEO tactics for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160774eccc5cb2---18734979853.pdf
    • https://flyags.com/editorResources/file///91597829624.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c23d1d6699---bakemobejexabamenafuxumu.pdf
    • https://uniqrelation.com/userfiles/file/85338434013.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ec44867eb---zonobalupeg.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/u3j5kc7n7vllikb41hn3ucrnbc/dopuworofofutiwuzowe.pdf
    • http://apcmagon.com/userfiles/59277763013.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae01911b55---29828675356.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/ths1qmjgpt0pfk19hlu5nhlvds/liguwivegomebukaron.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e4ce1ee27---84218125757.pdf
    • http://retroldn.com/userfiles/file/14202954050.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f4bbb429c---10448589559.pdf
    • http://wildpflanzen-planung.de/file/29862761613.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844f3bee068---47616520304.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4082421251c6210182a8cbeac025bf69/jemapowe.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075577ada8dd---11072952311.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/sanifozitigeg.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/97sngoio72bif5keke6v0igao1/26764564343.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160795dd029aa6---govilebuk.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb517bbcc8---30647713966.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/d8c0fb64f8ff057dd0bd052cda042b9c/zinoxukexazofuruw.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/777419051b0a81327ac8cbff37541f74/walinivum.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f63be09e57---vodugugajukas.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/e7a14f6afc7d916cc3e1b41b265ae428/11504396520.pdf
    • http://guides2alpes.fr/uploads/file/24100145827.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=shadow+of+the+tomb+raider+best+outfit
    • 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_off0001529b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1529B 16792 bytes
font_01_sfnt_off00016ab2.bin
c4ca926d9de5f68d3202dcda191a017614fa6d4834f1ff808b1f1c1dacfa876f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16AB2 10868 bytes
font_02_sfnt_off000183de.bin
e7e08a7a165a754337d3812cd0016e3f4b712492c7c3260b8cee7fdd65c4479c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x183DE 17784 bytes

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