Malicious PDF — malware analysis report

Static analysis result for SHA-256 75adeadbf7b69a7f…

MALICIOUS

PDF

90.5 KB Created: 2021-06-26 17:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4e14641e9961f5203fb8a152d07edcf6 SHA-1: bd640b7f58c237980516455b35528881ba6d2930 SHA-256: 75adeadbf7b69a7fddd26bd61a38af4bb9c30fa5e21787b3fc75e02e5ee5972b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised WordPress sites and disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms strongly supports a phishing or credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/0de30843c5847e83dcdeed8d0f7af822/17698737117.pdf In PDF document text
    • http://ilkyoukais.com/Images/Media/files/lodigoz.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afb960ce613---11433535256.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ac7390f26---zemenekedofizaworivari.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608951a8695a4---lafariwegoxinajigetuzotej.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607032b134519---wipasexipaluluv.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16079271f87bf1---vegunebofidizazirusamajis.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/49690105852.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/5ct1o59kk15i4i2oapo4ktju1d/39402250758.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3be81c159c262126c4e587a072a4e3e/fovakapiwow.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/19316691302.pdfIn PDF document text
    • http://amdind.com/userfiles/file/zipisilizinemabi.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1bdfe5b1b---50895402985.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/45425565496.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/7dd721f69ffe93f4100e8a538bc5abb2/runigogegigikewebolives.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e47ae62215---dobelabekikulorajupenuna.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/76bg4c3lc7itoq9dila7ueiqug/51951228290.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/59376546034.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160893b31e3e38---julosunofonemununuweri.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/80b7bda6c6ecb7872e64f09f952adeb7/nijuzagevojoxiwixug.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/44de4651600dfa889df00652f3b1cf8b/xonewanubizow.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/7ad8a31d3b1e18c1be917bed93562311/xuvogonivewujoka.pdfIn PDF document text
    • http://gaongonmaiphuong.vn/webroot/img/files/79889047061.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=excessive+gas+and+indigestionPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9E 10548 bytes
SHA-256: 62f2609635eeabf09f2edc7aec77eec2c9aabd2c10fd7da3a7e23d5e25ea305d
font_01_sfnt_off000117a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A7 16824 bytes
SHA-256: e397053c63947ab206d527d602175501334d99aea30988ef9a82b3d6daf5883a
font_02_sfnt_off00014349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14349 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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