Malicious PDF — malware analysis report

Static analysis result for SHA-256 2040f1ac8bcc0ed9…

MALICIOUS

PDF

68.8 KB Created: 2021-09-26 23:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 64db8636a7f49a92847c21280833721d SHA-1: 66980648ac22fb26827ae302105d46fd2618f3ef SHA-256: 2040f1ac8bcc0ed95aadb5ea3d626b7c9c8e43cfbd3f202f095d56216eae14cb
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm, pointing to numerous URLs, many hosted on compromised CMS uploads or disposable domains. The embedded URLs suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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 http://fitsiluet.cz/data/file/77153165971.pdf In PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/324d7a4f2311ad379e8834d8da313440/42780502073.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/pufozuxad.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/lefelodililatatarol.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/fisesomogo.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/pjnogshbu1dkq9ks4joun305sf/xigojobemegegax.pdfIn PDF document text
    • http://irvine.songhakbbq.com/uploads/files/telofiwonasasavaxivakufe.pdfIn PDF document text
    • https://afritransport.com/app/webroot/files/file/77839658034.pdfIn PDF document text
    • https://centaur.vri.cz/docs/files/bulurumipulupomaxap.pdfIn PDF document text
    • http://studiostocchi.eu/userfiles/files/wusewiz.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/99bd648beac616e7f37b463613d739d6/vavapozaxetutaserifabew.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/kitapijudovirapotilalen.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/a1e86ceadf715cea1ad5ca5165cdeb5b/zunarazevejowig.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/97449411630.pdfIn PDF document text
    • http://globalone-mould.com/gbw/fckfiles/20210907170001.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/zulekojumekikafavavetuse.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/pefesibizotumozuxiz.pdfIn PDF document text
    • http://countryclaim.cz/userfiles/file/gorubilidiw.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/70684209009.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16130823a47753---13162624.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/20887966888.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161490728d5062---linufo.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/lusekekofowapatifiwowelu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=new+ullu+web+series+watch+onlinePDF 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_off0000ae35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC647 14948 bytes
SHA-256: b9b572c6a2295f1a900b3bb5f7d1f4de5dcd5f75ca6fd3132f4a0d34f7f8d43f
font_02_sfnt_off0000ebf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF9 10628 bytes
SHA-256: c23dbec2704ca8c76dbfb2f0a649c09eb491d878b76e058f19c5e83f67242287

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