Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde0c58654bd2e5c…

MALICIOUS

PDF

74.4 KB Created: 2021-09-16 02:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6040c825ba5fdff432371d4ef28459b9 SHA-1: 68fdabce62851311c1b8b4d32e284061c6db3fbe SHA-256: fde0c58654bd2e5c8eb1eaf7aed63aa8bb6c33e088d9176e2910894ef9fc0648
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of urgency lures further supports a social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://inwebjor.ru/uplcv?utm_term=online+instagram+highlight+viewer PDF link annotation
    • https://mbzgogo.xyz/web/img/podborky/files/wujikezi.pdfIn PDF document text
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/74935597772.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/37012691429.pdfIn PDF document text
    • http://sabaparsian.com/ckeditor/files/files/kefabagulopozadimigujeker.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/f00d9608e37e0668b0ebe828b437376c/jilodof.pdfIn PDF document text
    • https://cometgroupinternational.com/ckeditor/ckfinder/userfiles/files/59157268474.pdfIn PDF document text
    • http://www.skk.com.hk/admin/ckfinder/userfiles/files/kujefasekubepukun.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/kalotusixadosur.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133bb431cf66---72452171890.pdfIn PDF document text
    • https://tefen67.com/userfiles/files/nidefisogojudopopizubep.pdfIn PDF document text
    • http://turchifiltri.com/userfiles/files/68621770127.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/javipoludalofobikegik.pdfIn PDF document text
    • http://jmk.kr/ckfinder/userfiles/files/ponevi.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/54606246278.pdfIn PDF document text
    • http://01host.ru/userfiles/files/zituxobiwitug.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/fodazumepidelotigogugikow.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/27889036987.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/36434992061.pdfIn PDF document text
    • https://anjingliar.com/contents/files/rumadobinanexurikutajom.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/zusiluvutofomo.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/funokowunizeradumemowa.pdfIn PDF document text
    • https://rentcar888.com/uploads/files/202109100947383700.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_off0000c0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E9 16684 bytes
SHA-256: 8dca1d2dab8d0b4540494e1f5000b9b27b1149643d142300dbf1f46bfe5b7082
font_01_sfnt_off0000ebca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCA 10612 bytes
SHA-256: ed419a97350259270ee12696ce44550b8718cd00906969d64c44b202f7e022fb
font_02_sfnt_off000103f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1