Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7da5153fb65917…

MALICIOUS

PDF

91.9 KB Created: 2021-07-06 02:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 46feeb95da6fe0fa783d088ae779b535 SHA-1: bb58e68f4b10981a7bebd4a3847f2ee3ea05ff9f SHA-256: 2b7da5153fb6591767738b2ebade1f7474505b89a441ed526b7cd85cd86feba4
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded links point towards an exploitation attempt, likely for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://laborke.ru/uplcv?utm_term=mono+angel+fish+for+sale PDF link annotation
    • http://anaminfo.com/attachfile/file/puwixosoperigavukisuxerav.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/24vtslb9dnvgcrlqttrqf1ucep/kodetodimaxugatezimoboku.pdfIn PDF document text
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/45838542496.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/e77059bd9cb1f81b450e6ee00600fb9c/lekiwe.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/rarogasumudewanuzoju.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/59009443718.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bbef32ef9---7096083438.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/zeximibuwidujevexifami.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/684ba5ec5b57881a96a8a3c853c97668/mekawo.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/fedelipekux.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f9c955df1---leren.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d90316d1c---gusalarodalukatuxi.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160ce750701e97---32605934102.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/tudig.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f7c621c20---bubufane.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021060318552498.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d247ce56a4d---nijanixotipakabatam.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b53952137384c2852142d9b5bf2f6eec/kojivegaxurujokavosafa.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/tobilokuwegexawupidas.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c772745d61---gajulizasizajiw.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/38cd68c248d95ab75da049ad514c4844/gajixi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe91a11e2d---pijeterefotideberelexene.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/wuxodejoneguxi.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/58170747805.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/gejap.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_off000104c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C6 18044 bytes
SHA-256: 5e3f0c9df7f9fb9176191070b1ba25a653dcbd51bd1b3bc16ada9e15cf2292b7
font_01_sfnt_off00013308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13308 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B1F 10388 bytes
SHA-256: ecfe31692f053e13035ef7eebd4978831aeced6dbcf828d56437e97f209b3fa6

Open this report in the interactive analyzer, or submit your own file for analysis.