Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e38b78efedfb40…

MALICIOUS

PDF

73.5 KB Created: 2021-09-06 15:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 485c2d8e623a01a9703c20085b0eada2 SHA-1: 2abf7c2cad2c311807441eab552a4e55e1d5c366 SHA-256: 48e38b78efedfb40c87d28e3c7eacca3fe91cc77a79b72a220f608673ad10ecd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or further malware downloads. The presence of multiple links on compromised WordPress upload storage and disposable hosting suggests a tactic to obscure the true origin and purpose of the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://archism.ru/uplcv?utm_term=particle+in+a+box+problems+pdf PDF link annotation
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799c9a34b7a---70178379307.pdfIn PDF document text
    • http://www.polni.si/Images/files/46967285579.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210601045105.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/nupozofamuwexeguzikasid.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/vj32tlvi3heh14emal3vmeno46/lomevepagovepekalububojik.pdfIn PDF document text
    • http://wsm.hk/images/files/zeketunosirajafupupetoku.pdfIn PDF document text
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/figokoxu.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/fosugoweluma.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/minoxegedenikabetixomikoz.pdfIn PDF document text
    • http://www.reeder.ee/files/filemanager/segamedusinaven.pdfIn PDF document text
    • http://c-amc.com/upload/files/zakumutamajivij.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e38027c75a---fenenoriwum.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/pekutusalubewurimotakolo.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/24812675878.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/xakapu.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/67538409789.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/dozitewomot.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/73011046189.pdfIn PDF document text
    • http://duz-drustvo.si/uporabnik/file/befomawuvirufuxufa.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9610c9ea5---26712087772.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdab90ae2d---ruregulijar.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/2c89192468a450811431cde14ae0b31c/68262463855.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/joxadexawopoxudeseludej.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/bapafedutojafejaji.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/xekojupebabazorimokexizug.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c5b2c67ee---xabokositon.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/976794395.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_off0000bbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE9 17436 bytes
SHA-256: a798c6c0266b51740ef11e72a2f1541ffa4493bdfd0b346c052da834e5c7a89a
font_01_sfnt_off0000e6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C7 11024 bytes
SHA-256: 304c8838effef858c6dd4596ab0f30a8c8e6ab23a1621b64b60766be31cc50da
font_02_sfnt_off0001002f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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