Malicious PDF — malware analysis report

Static analysis result for SHA-256 de718114255a19f0…

MALICIOUS

PDF

94.8 KB Created: 2021-08-01 06:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c186a9835a77f1b4e559859bc4bbb5ac SHA-1: 68d8779d9e1cc9355e0547c8277e1d7ab444a7ad SHA-256: de718114255a19f08fce994b97f76387a733007c89fd3b9f953a8216eeb48305
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://banghaija.com/userfiles/file/netafalerogitutigok.pdf In PDF document text
    • http://aa-nusd.jp/92745629696.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/u7630rag1s23p6ncd0rqeni95e/2349521976.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///49705957603.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7c3f33e45---55885954792.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/0b4aa17ffd8897c351791d621304d05a/denurasigepizubiw.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/9ptup0c04hoghm0ou9vckjig8r/18216581361.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4a132acb6e---55150720320.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/kojafipav.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///68904399416.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/f6996f228977dbba00985b13c0266b7c/tiviwajovasodivodutavewod.pdfIn PDF document text
    • http://giwajib.com/data/editor/file/jexabunenixonafikaja.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/dadazilidowaraleniw.pdfIn PDF document text
    • http://chineseclothingonline.net/File/molinagubutakedaderipazi.pdfIn PDF document text
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/72mgkprfo213scpf6qdau3dlrj/71842355983.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/d907f8f79526c6e08295674ee6a8b374/nudurabokesunotufojuli.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/sosuma.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c610b6ba550---54409059158.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5ee08677e---dowisokin.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/6004717865.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/vadamesebasebaw.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c31b1fec0---jijagurazowaw.pdfIn PDF document text
    • http://mav-auto.ru/images/file/xubetevokaz.pdfIn PDF document text
    • http://le383.com/uploads/files/sogenuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+connect+hp+officejet+8600+to+wifiPDF 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_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12494 17936 bytes
SHA-256: a5478f27e513665f42a401741c8dbfda423a233d093f473ad294266cad97c96e
font_02_sfnt_off000153bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153BF 10804 bytes
SHA-256: cf20ef8757842d1e37ace464e8714b538f309b7c3e6ca8534ba9836ebddd55ce