Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63e9535c925a73b…

MALICIOUS

PDF

79.7 KB Created: 2021-09-11 14:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a99e8292123782a00daaef32802bfa0e SHA-1: 59b85c11c8a475653f210c3383f869eb8d016d05 SHA-256: c63e9535c925a73b490787cb818780eb15a53296649c13c2a603f55f01b59d32
154 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, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The embedded URLs are likely intended to redirect users to malicious sites, facilitating phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7217

Heuristics 5

  • 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
  • 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://dennismaloney.ca/upload/editor/file/mifalusut.pdf In PDF document text
    • http://westernmaki.com/uploads/files/zowafilekimekapik.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/dezikagese.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/161317ebda7a81---43003556242.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/94980990129.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/wulilabodafisegurabeloni.pdfIn PDF document text
    • http://www.vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/zulabalatepexewuvi.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/16917704478.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/52939232725.pdfIn PDF document text
    • http://www.asiacoservice.com/file/files/27530296012.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/55689513669.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/63499288479.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/13211445763.pdfIn PDF document text
    • https://12shio2.com/contents/files/85319094321.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/c15ntdo0lt3eckmoo5uh9chro2/62912549646.pdfIn PDF document text
    • https://salonrewards.ca/images/file/rawisop.pdfIn PDF document text
    • https://ekransamara.ru/files/dekivugazifavov.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/8432327305.pdfIn PDF document text
    • http://photonart.nl/phpcmsys/file/76470847683.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021091115270373499.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/besipavib.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/13023838641.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/fugituvebenowuru.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613a08045fa5b---28281623395.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/dovixezadowerezekowiso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=pocket+kingdom+own+the+world+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EF 19812 bytes
SHA-256: 2513ad9c9360a11317955e7d363fe67ede7e96ec664540e6414f78cf8cb655e9
font_01_sfnt_off000115ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BA 10828 bytes
SHA-256: 7cd506e0f9ee0f72b12836fc791113c889856301414cb1e10770e166dc675f9a

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