Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9597d8b6ca4be7…

MALICIOUS

PDF

93.2 KB Created: 2021-08-15 00:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 647d2ef67773d3462ba1a4833e57537d SHA-1: df0fa4ac1c19f6174034c8e7dc5bcae5a7a5b616 SHA-256: 3c9597d8b6ca4be7e49740343b790d26741ae00e081a8c8985a65220743235cf
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a high number of links to external URLs, many hosted on compromised WordPress sites. The embedded JavaScript and link farm structure suggest an attempt to redirect the user to download malicious content or phish for information. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://catamma.ru/uplcv?utm_term=the+space+between+us+full+movie+download+in+hindi PDF link annotation
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/0ot6aeo1m3k2lp14aaha98ugb4/75746051243.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/45774408677.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/20829814158.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c969901b97---9645759850.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210722175650146758d0rwod.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/18304935326.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/watokelexutoxitos.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b85c4bcc19---kajexiwofaragulukefonebib.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/61144450235.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/71784160776.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/77873427767.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/80408067371.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7a550c75f---73433730204.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079088c80078---sizekababebebudera.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/52759092461.pdfIn PDF document text
    • http://goref.ru/files/file/63650475844.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/18f58a3a227ed350a5ddeac52b8f9fce/kabiporeliwaxoxuxej.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/dokojubojarub.pdfIn PDF document text
    • https://mkontakt.pl/dat//file/60939913895.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/jibabuvobugawuluselo.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161009627150d0---83986012355.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/msu9nsrs4p7khvebp02cl4h1fs/seduxodivoxufuvekonujevo.pdfIn PDF document text
    • http://www.trotasierra.com/plugins/ckfinder/userfiles/files/16677162838.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/5cd7eb9f0ba1ff9ba225f5158816bce0/27057851230.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca7b77beb5---vutewixuxeb.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_off000107f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F9 17372 bytes
SHA-256: 6b5c1c3fdc8d03f39e8e8aa5c301d2c8e26afbc47858cfbdbae7b68b52835689
font_01_sfnt_off000134f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F9 11140 bytes
SHA-256: f32ddd01ba7e5f549108170a3342139c1af1c5e8e26d56271c4a60a142379cf4
font_02_sfnt_off00014eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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