Malicious PDF — malware analysis report

Static analysis result for SHA-256 945189260caa8ee6…

MALICIOUS

PDF

91.6 KB Created: 2021-06-26 06:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 79216ce721be3f73ee1c7c76c168d36d SHA-1: c3da3b3200cbf71aa98f05be9381f296c88fda01 SHA-256: 945189260caa8ee680dc8912a18924a7832539a040b99816925166be78248ad1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. It contains numerous links to external websites, many of which appear to be compromised or hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall detection profile strongly suggest an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://qqhanoman.com/contents//files/93763883320.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/gbjnckua6217t122acacs2j45l/valosalajewilinili.pdf
    • https://zabulgaria.org/userfiles/file/mezuraliserabunawaniw.pdf
    • http://curry-box-deluxe.de/userfiles/file/xisewamamuwujakusefexip.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d59eb61781---86077180200.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607475eabf771---kerikafaxetowemox.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/554fa4d121b82a92c6c2414c36083bb7/dozin.pdf
    • https://sanruouvang.net/images/uploaded/file/30063919734.pdf
    • http://acecaalcoy.com/userfiles/file/93925620600.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/9faa630smrucmmep6ha2co4hmn/lurotupibezabufumot.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/8a21ef40d9e9e7b54824c6caf281063d/tedewubav.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/1jhuu1vcv53a67ii4ir0ejle08/36501920367.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608c50cf89f17---85582459224.pdf
    • http://big-blue-bus.com/pics/fotos/1/file/99976094965.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160824f1f3e5fc---96373544163.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc7e7df3d2---vafuselilomulebefide.pdf
    • http://alarcon-v.com/editor_upload_image/file/zaloregoponogepadumomozuk.pdf
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/suzexitawexoju.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/87dfddf56f3b27b89ecf9e6c372804da/50869019560.pdf
    • https://aduanaldelvalle.com/userfiles/file/suwefikijem.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/a4fd438edb7bdf21e81964f5514e0dd4/28005544433.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a00973e1804---50916447062.pdf
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gifugadijaxudola.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/77f74634e50114c50b6abeb61105eed8/fatijexorizopakosaxofam.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=traveling+at+high+speeds+requires+blank
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed77.bin
bb55c0a38f87717b6888377e4c37c38c2ed9706130f31dc1e937c9d600c68a2c
pdf-font-stream PDF embedded font (sfnt) at offset 0xED77 16980 bytes
font_01_sfnt_off00011a05.bin
f1892b97bb003419ebad53cd25bdc5951d757bc1ae34609eb086abd7ffcda3ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A05 11060 bytes
font_02_sfnt_off000132ef.bin
9f9c9255c0426c77c5b13ef22f4242f4f7095bfd8ba808a20cf1712cd58ffb40
pdf-font-stream PDF embedded font (sfnt) at offset 0x132EF 16236 bytes
font_03_sfnt_off00014889.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14889 16792 bytes