Malicious PDF — malware analysis report

Static analysis result for SHA-256 38cf6bdce67eb0cc…

MALICIOUS

PDF

79.1 KB Created: 2021-09-07 11:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1f0e2a61b5ad77b062e2358e84d4bdaf SHA-1: 25ecad1f86eef4349d6e0b7572a9b2c6050cff6d SHA-256: 38cf6bdce67eb0cc104257ec6fa39f1ddf31c19c4672a10c75b7a8f156301aa8
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 7

  • 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.
  • 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 http://sage-chem.com/image/files/20210710_121647.pdf In PDF document text
    • http://southerncross-ex.com/images/blog/file/89576284199.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/zexudamiguzosate.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/4k2ao2hlojj9m9485hphlvksmn/ledegabapozuwako.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/7614253969.pdfIn PDF document text
    • https://detectagsafety.com/ckfinder/userfiles/files/50505298807.pdfIn PDF document text
    • https://areicon.com/images/file/14672412468.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/dutojeg.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/30130030d6699f0b29c2b74d5962fec8/vuvuzozukavevipodukoge.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/97566177039.pdfIn PDF document text
    • http://talleresjpg.es/img/file/kixonexi.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/xolubafugisebomafikekabek.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba368a16f4---45242606499.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/bovoretevuwalu.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/0161301e2601b888990a201722d19037/52339886023.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/0397bf289221195eabdd400915e9f38c/porikezamitiwuvolo.pdfIn PDF document text
    • http://dancingstarsgreenwich.net/clients/1/10/10f73e4104fe6082999c9b722aa65ba2/File/silufiromarixizefadubiv.pdfIn PDF document text
    • https://ive-cal.it/file/sifelemabul.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/b275518ae15025f78250e650faa93b8f/84494638210.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/k9a9osiljp9ecusosiebvgp2va/zanigojukegedubufiw.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/badetabebisupa.pdfIn PDF document text
    • https://f2h63c2.ip4secure.net/upload/files/vekewisibulofarelejibexor.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/2534ce2c9a51bcfb20a2f4a3a4a30bae/28996804324.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=telling+time+worksheets+for+grade+1+pdfPDF link annotation
    • 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_off0000ce6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6E 11136 bytes
SHA-256: 37989df5fb30e9622e1fa023d45d8fe2bd63aa64e0188ad41891de49439408af
font_01_sfnt_off0000e829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE829 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001003b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003B 18120 bytes
SHA-256: 8ab6024b2c3e4ac061379e1a6ce1a562b29866cd21b11f458680034cf26395e5