Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2c7bcb2d4b130a…

MALICIOUS

PDF

74.0 KB Created: 2021-10-04 15:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bb65f4a251020ed1749ec3757b30d6e3 SHA-1: acdb30007337e64b3b8ac7262bc2dfc755386d4a SHA-256: 2e2c7bcb2d4b130a19cbe0cf2e376f50a6e751fcb4868c1fb3f4852ae4c12667
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable or compromised domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery via these links. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://crewmak.ru/uplcv?utm_term=bully+anniversary+edition+download+mobile PDF link annotation
    • http://wisdomtours.net/upload/file/7058315907.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/jutovibefifidexapegixi.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/xusexowagowe.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/5b484bb86fb26b5eddd8a23d3b484071/59448640922.pdfIn PDF document text
    • http://xhzhengli.com/upload/nobasevufuf.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e85a38a799---zifawereputo.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/978daa9427dc78a7d27d7ffb6096943f/82883734768.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/medapumotiveda.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16142bdf619224---93689935613.pdfIn PDF document text
    • http://italy-ex.com/images/blog/file/89432150036.pdfIn PDF document text
    • https://ecoverservice.be/gallery/file/92581256168.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/nivativenivateju.pdfIn PDF document text
    • http://topbuild.net/content/xuploadimages/file/77519429414.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/86263305663.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/nesebepefagujapunomepu.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/7038131283.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/xiputu.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/javadu.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/4053016880.pdfIn PDF document text
    • https://servicepapik.ro/files/zareribegujerarop.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/boriza.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_off0000b90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB90A 10968 bytes
SHA-256: 3b641fa577d267dd7bcd3ea90c837b8411d447a5dcbe7f97aab781cb734b2463
font_01_sfnt_off0000d296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD296 18540 bytes
SHA-256: a78a09c15413cba7d9a6982777386a8647c76f823ab4b8d315be7d97ce75d799
font_02_sfnt_off00010234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10234 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1