Malicious PDF — malware analysis report

Static analysis result for SHA-256 a399cba66646ddf1…

MALICIOUS

PDF

74.3 KB Created: 2021-05-24 12:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11bbf867606ec73f183b1189ea7f06ef SHA-1: f057267658762710978a0162e5a764f7aaed8b65 SHA-256: a399cba66646ddf1ba23ce878978ec4152900f65a0ce3033508cdaf18fbcf9ca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URI pointing to a malicious domain, likely intended to trick the user into downloading a payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the presence of external URIs and the overall detection profile suggest a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=mod+minecraft+1.7+10+carpenter%2527s+blocks
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607de0272f56e---tugudilazi.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/c5d7ca4c74ff79862802305ebe2f5bfc/joputumupareb.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/d22474825078c53940b6cd2fecdfe694/60205178927.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f18045a42---dirowajijefazipegozok.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e03d5c4de---xawexoraramuzigizogo.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/8cdb7cc3b5933d9817f5c407fc77fb5e/65020847921.pdf
    • http://akinmedical.com/uploads/file/93675679445.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090d45554033---61359329245.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086852e62e54---55258599100.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/mjnathel6b5vfsd652q9v1eq9l/93135124917.pdf
    • https://bursac.net/userfiles/file/gosupuxumedofidubuzesug.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6797b742---47296629344.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/a14b7cb5632c74fe7a7dbcab4fa284b8/xuzidesipava.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/22com0prptdqqgmid4i9pa8ihe/18376121090.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/a035ae502eb12e55a83335ea60cb4297/saterademaselixopibep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e181.bin
ffd808f0a865bf11a9b82b2636616e330059fc27e0b7986c8e5b29e1a85fad57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE181 5852 bytes
font_01_sfnt_off0000f573.bin
0c2f1974733747fc1ff0f8a6834506f10ccdb1fcf7de093f32a1e140034aa888		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF573 11256 bytes

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