Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd8a2e5f2fc7023…

MALICIOUS

PDF

68.4 KB Created: 2021-09-21 08:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 54047466875c799429d705556c725cc7 SHA-1: d8025410d5a59acc0788ae30551b45be43048584 SHA-256: 5dd8a2e5f2fc70233822b9955a137b5d48a5f0868e3e32398fbf85617beb383e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous external links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a tactic to obscure the true destination or leverage compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7647

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://wastran.ru/uplcv?utm_term=kamasutra+tamil+book+free+download PDF link annotation
    • http://www.ecostroyservis.ru/File/pifufigeruzazigexubaga.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16143a185741cc---nogutavizu.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/gufofipijuxaxe.pdfIn PDF document text
    • http://beverly.kopanramen.com/uploads/files/wefedoxikubu.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/mevofegugisamofidileramo.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/kunaxegozarul.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/jasebejopelap.pdfIn PDF document text
    • http://parikshitconstruction.com/uploads/dafigemazotasaxukowod.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/wapapon.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/77890400908.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/banabijazizomuwuwosek.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/j27d17hptpdpo4t4c6jsip00u7/nutefadiwow.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/50361419352.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/16197292053.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/161405db088237---84932389801.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613921e2f1f5b---30750359292.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/woxidoz.pdfIn PDF document text
    • http://productinfo.in/konadnew/userfiles/file/jiguwegivizinavelivek.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614931e8d4109---4543840466.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/37849936058.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/6765305718.pdfIn PDF document text
    • http://kkslavicin.cz/sites/default/files/file/92543608652.pdfIn PDF document text
    • http://youil.org/userData/board/file/dodegapedagenumi.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d34db35e7---pirufok.pdfIn PDF document text
    • https://geelaboba.dswip.com/ci/userfiles/files/12099270859.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74A 23084 bytes
SHA-256: f9fd27894354ef4219640ea10623beaaec27f582d86c657a0fee99b2f7329356

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