Malicious PDF — malware analysis report

Static analysis result for SHA-256 518316768ad838bf…

MALICIOUS

PDF

86.9 KB Created: 2021-09-01 03:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07a17648210991762f25d041fb0f493c SHA-1: 32467b4a5d25c46aad9b5ca6d3c362093d49b7e5 SHA-256: 518316768ad838bff76e6d85ba18b1324cf7d545e837113fd4dd90306f3e6a44
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The primary URL identified is https://garglob.ru/uplcv, which likely serves as a redirector to further malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://garglob.ru/uplcv?utm_term=half+red+and+blue+hair
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd33ba1e23---rolox.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b4eccace3---38268922420.pdf
    • http://cec-intl.ru/app/webroot/files/file/fonopito.pdf
    • http://nb-magnet.com/upload/files/64264815251.pdf
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/10121080779.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720209f13c1---90244749305.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823c0deba2b---jijebivago.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100ad14b2aef---vanifipegaluwori.pdf
    • http://bioident.pl/photos_fck/file/wuwusifotajovufumi.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a420735221---nijoziv.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612b9afd8b15d---bajagedufalekezifu.pdf
    • http://pagyesa.org/userfiles/file/20210802044144.pdf
    • https://parfumzone.ro/files/file/54063210710.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086c38aa859d---91256166984.pdf
    • http://cropscipublisher.com/files/upfiles/file/jupozulezipuwuwulifotazu.pdf
    • http://nirmalapublicschoolerumely.com/userfiles/file/56062319048.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608562aa883f6---98063233398.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/p74p8deurh92tlkj0tl5lclji6/18104677267.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/67b81a18be3b03b48db8eebd6356eafc/56369668247.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/0510bd23f625a6f3534ee580f3368f97/75708871749.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/pt0o3em1s5qgtq1qj1p8eiukc0/22252805548.pdf
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/zakapasezokitedifeji.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/m8gmvfhu091raojnhefmctujj4/waxawazawanovat.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_off0000eebe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 16792 bytes
font_01_sfnt_off000106d0.bin
12b94863e50d4c85852c2b6c422d2cc3d75dafbe4c94fd9477772e37a0bc58e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x106D0 18080 bytes
font_02_sfnt_off000135f6.bin
412a43e6eb77dabfd6cd9f807f3bce45be07b4a6ccbd7ebff24bae7a77ac406a
pdf-font-stream PDF embedded font (sfnt) at offset 0x135F6 10296 bytes