Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e70787e731e95aa…

MALICIOUS

PDF

157.3 KB Created: 2021-06-14 20:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d7afa44013cee2a20dce6c37bb026ad8 SHA-1: 3c66ac38889d9a2449ad909b18264f355eaca609 SHA-256: 6e70787e731e95aa045ec1738d8366b36277fbc4ee78ac256343d142009980f2
136 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides instructions to download a password-protected archive, a common tactic to bypass security scanners. The ML classifier strongly flags this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://medvor.ru/uplcv?utm_term=oru+indian+pranayakadha+movie+download+utorrent PDF link annotation
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160967c74ed2e4---41711256744.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3e2f39094---32068588773.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160758c617e3f7---10843444037.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/523875da9daafac61481604bf7c51e86/negapaka.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd03c339b8---poveguzawuwa.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/ee1a68fda305d25f51cfef01697bca53/bojuluwiwazuxumupow.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/c1f91a5bca33b25d2ce7866ea47173f7/81308384345.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/3248c57952a01fd32117aaa63d919ea0/degumog.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ed1d82f8ff4f5b7c22512ffea95eb48d/89398505593.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/2bb6a2a2fee5d6f44d6606a18fefbff8/74768496725.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b52a99c3696---kipabemiferakanide.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/58462995315.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c24a523c311---70215630931.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a798f3df34---xodada.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/xumofutepexowomigoxapega.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/5ddeea826cfe136e739abbab9bf8f852/27243128904.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/87984669442.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/dt29ldo1gsqmeld5192g4c34o1/gabokerotedunidaterajere.pdfIn PDF document text
    • http://kaowei.tw/image/files/20210527_071221.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off000216b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x216B6 5364 bytes
SHA-256: 14c314a454d66157c7888fc4c6e0abed56323efd36676ca14419efb9afafeeed
font_01_sfnt_off000228e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x228E3 12204 bytes
SHA-256: b4798a4a48e89f0ba0a0c21f105f90c44d3d64fb7bafd6b87bc6fd38745521ea
font_02_sfnt_off000251ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x251AB 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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