Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe5c6cfa4e5a02f…

MALICIOUS

PDF

78.0 KB Created: 2021-09-15 13:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 71c4c613de74dd1b009d24273d8ff050 SHA-1: 4b78dad3d9777f731f4e6ec299f6f1f538307cd5 SHA-256: bbe5c6cfa4e5a02ff3fe9ee282380e8dae33253d58d209bd13dce55c41915244
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites. The heuristics indicate a link farm designed to redirect users to potentially malicious content, such as the 'euro truck simulator 2 apk file for android' URL. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=euro+truck+simulator+2+apk+file+for+android PDF link annotation
    • https://enkaotomatikkapi.com/depo/sayfaresim/file/fejuratuwukoxila.pdfIn PDF document text
    • https://strings97.hu/userfiles/file/90856796424.pdfIn PDF document text
    • http://jcnjl.com/userfiles/files/92478934103.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/70334130091.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/3154605683.pdfIn PDF document text
    • https://horgaszvelem.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/4247325190.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/fe97147878120edf52add64d0fd4a447/jaxavomuvakakul.pdfIn PDF document text
    • http://rinsacars.com/files/others/16718764422.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/xasuk.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/bofulapasisirilozina.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/tinoleratuzezabu.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///gogomego.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/d2d5b2f5ac91673e3d1b6877bc222bcf/69354078670.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/97111586476.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/48883155900.pdfIn PDF document text
    • http://plusdesignwebsite.com/userfiles/file/35697442486.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/40394308827.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ede42d8b2---tewukawifedoxipor.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/durukanetoxojenewoxem.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/17539946198.pdfIn PDF document text
    • http://buyyoutubesubscribers.com/ci/userfiles/files/72647599961.pdfIn PDF document text
    • http://telektrans.hu/editor_up/74019234173.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/97330618023.pdfIn PDF document text
    • 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_off0000c8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B0 11076 bytes
SHA-256: 292b10d10f96697b8e7afcfdcfc6aa907dc8fe534a18440d20ebb6700191cbc7
font_01_sfnt_off0000e28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9F 18404 bytes
SHA-256: bdcd31611d04d9415e0f2f0846fabdb931f641ba9279638eea51ccc37dcd8cc5

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