Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c327ddc60c5c47…

MALICIOUS

PDF

83.0 KB Created: 2021-09-13 14:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 32f2ec4b18d1e3da5c9478556cc51e85 SHA-1: 793801d827ec57348eec95450341d063c6aa6720 SHA-256: 00c327ddc60c5c47528130f752dddce2a49fa3040328cc91397355964b35ece0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm designed to redirect users, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://philabc.ru/uplcv?utm_term=iq+test+app+for+android PDF link annotation
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/ramefafojugezelewi.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/1f4b88d965b4e9995ac2be97862404cf/68334646156.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/botojajaroxeneva.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/92296459559.pdfIn PDF document text
    • http://apartmany.cucoriedka.sk/data/files/fiwarefepalizemapubiw.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/21968453136.pdfIn PDF document text
    • http://aguito.madteam.net/ckfinder/userfiles/files/vakumatudaxenekodo.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/75158584234.pdfIn PDF document text
    • https://altaitur.com/ckfinder/userfiles/files/83035038887.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58909170269.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/656c15cf4bc2e6b40288da35f93854d3/katokojexeset.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7f6d18986---fisotizibijadidakinedev.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/jerosuxirunorem.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/jemakafogunijuvilikexodav.pdfIn PDF document text
    • http://christ-china.com/filespath/files/20210911145010.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/fojeluteragutuwagu.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/lugepesuvurupodoza.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/nixuvawagodobejujup.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/siruzim.pdfIn PDF document text
    • http://charolais-hessen.de/write/userfiles/file/zafudoladesa.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/taritoxedozomuzuxujasop.pdfIn PDF document text
    • http://golfvillageonline.com/userfiles/file/jatofasebidarujufugax.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/tikugijonezoxuwuko.pdfIn PDF document text
    • http://metabolizmusonline.hu/images/upload/file/rabawugudukanejinu.pdfIn PDF document text
    • http://topstec.com/d/files/49948523176.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_off0000e147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE147 10540 bytes
SHA-256: 348a524a40009105e23342a5ef11fc08474130b35358fd289d2c88489a3b3232
font_01_sfnt_off0000f929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF929 17692 bytes
SHA-256: 6581158478a69b6e4e10f6a57e44b2da53d6d3ebccde0c76090d1cd81209b86b
font_02_sfnt_off000126a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1