Malicious PDF — malware analysis report

Static analysis result for SHA-256 eace86bd71fce170…

MALICIOUS

PDF

87.7 KB Created: 2021-07-27 13:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ee6e3d2040e9b7f670b0713c7dd89cb7 SHA-1: edae40821979d92e3e3f9a8f7ff89b7b4bbc3aed SHA-256: eace86bd71fce170a84baca05fd3147f1e86e8143265a7e476a452e614d43a64
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, containing numerous URLs that point to compromised WordPress upload storage and other disposable hosting. The ML classifier strongly indicates maliciousness, and the presence of multiple external URIs suggests an attempt to redirect users to malicious content. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 5

  • 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://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/7047f77af15da5a308d862670557acc3/84979768188.pdf In PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/3bc9fc11c82fc3107843057ef15f02e4/jabejexekog.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16092768bba973---xilotoz.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3eb091d22---fafexazidulavibabamesu.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/63492368785.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608506a785c42---38589926361.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/kekogutofonuwafetawe.pdfIn PDF document text
    • http://voyageaventurenepal.com/upload/files/dafarinoremekelanevatov.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/25942994909.pdfIn PDF document text
    • http://xn--xhq021fvrwdth.com/d/files/35237425046.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874046a464b---45784534552.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/wenimemaromi.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/ovpcobcdq9llfqp96dvuume4e0/74002305751.pdfIn PDF document text
    • https://uniontend.com/userfiles/files/84079951784.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/tosigetewumute.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/3c3c231164bd6bcd0baa5ee6f16d8dcb/wuwatudebana.pdfIn PDF document text
    • https://mollis.rs//files/kekifukagapegutakegirolak.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/88403942344.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/e5768143fae3852bb00dceb40fd3e142/vifasenuvedijetugove.pdfIn PDF document text
    • https://anaksemut.com/contents//files/redasivefineb.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/15038494991.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b3ff32905---debore.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/2788897896.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e48208247---66559808788.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/93166981457.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e7723ce00---lozowisavi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+replace+battery+on+onetouch+ultra+2PDF 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_off0000f34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34A 10764 bytes
SHA-256: a95f0e0fb23947550c8d51d3fca0c25f57908b8822edbb6785499bd6b1e9e299
font_01_sfnt_off00010bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDB 17072 bytes
SHA-256: 8138aa50ced3e210c47d48a79459092cf3463257ccd858f1880f83f09f3c6768
font_02_sfnt_off000138be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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