Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62d4467d78ecc05…

MALICIOUS

PDF

87.7 KB Created: 2021-07-18 10:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bf10772189019566a1b3e1b9e9ff457 SHA-1: 97000b2cdc7247ecb2ab4126c3c3422c13007724 SHA-256: f62d4467d78ecc05b36eb07bc6efed1f4fb54633ad8f6f1d319bb96304d8fbd4
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The presence of numerous embedded URLs, many pointing to suspicious domains and WordPress upload directories, supports the conclusion that this document is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ixtvs.de/_upload_bilder/_filemanager/file/53949888899.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf77e38a81---nogomazezejizosagetaz.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b54e37158d---bebawukexajolukav.pdf
    • https://menuiserie-sainte-anne.fr/userfiles/file/desuvav.pdf
    • http://kurpinar.com/img/userfiles/files/ruzoxolimopavitipeb.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/dgddhe7p7359aa77m6rpimurh5/49726111853.pdf
    • http://proxima-design.cz/files/file/wobogilorefinakonafasi.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/p0lnhd07otgu9fcrnjrvth6j4v/raxufewipovokuvokoju.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf59f59a36e---9373514957.pdf
    • http://groupkaishan.com/d/files/79355950489.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c684f35899f---10413183575.pdf
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/cdfa2e3ef0053c58f3b11955571a8fc2/19261108362.pdf
    • http://ergo-logo-bamberg.de/userfiles/file/zidalenemixamebegadasoz.pdf
    • https://abofahed.com/userfiles/file/gegemidudug.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/fd15db4959db3480a126294b6a469647/mepimiwominorolufomug.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/57af7569dc3f20c81bae524da47b24d8/xukavexoguw.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/210b8f13d4a3caec18c642646b682e08/fimororomuki.pdf
    • http://rm-parketi.si/uploads/zimekowomojomulegu.pdf
    • http://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/wawikerozebuk.pdf
    • http://kartywspomnien.pl/uploads/assets/file/29142728921.pdf
    • https://cafemocion.com/userfiles/file/41463595712.pdf
    • http://nwatchonline.net/userfiles/file/kulojefesefebijazaxow.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a48e147dbce---votefukonovejin.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd870b3123b---95613154930.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=introductory+digital+image+processing+jensen+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_off0000f227.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF227 16792 bytes
font_01_sfnt_off00010a3e.bin
07ff4ba212ee8caef891c0753a42abcf4e317bec499696c13f16b9770c39d58f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3E 11256 bytes
font_02_sfnt_off00012468.bin
b02b5ff9be031e41299d21911e5e1fb817e0c4677b3e9de26c5fc1299701dc45
pdf-font-stream PDF embedded font (sfnt) at offset 0x12468 17140 bytes