Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe646f0543b273e…

MALICIOUS

PDF

69.6 KB Created: 2021-06-16 00:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b72111b568185182f96ec4498a1bb3d8 SHA-1: 51cd374fd651e611130341b300dabf6386b1ae32 SHA-256: 1fe646f0543b273e96706636a22dd236ea3cda3df94a2fabc21fabb4861955cb
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, employing a link farm strategy on compromised or disposable hosting. The embedded URLs, such as 'https://pixomot.ru/uplcv?utm_term=cheran+pandiyan+mp3+song+download', are designed to redirect users to potentially malicious content. The presence of multiple links on various domains, including those leveraging CMS upload vulnerabilities, indicates an effort to distribute payloads or further phishing attempts. The ML classifier and ClamAV detection strongly support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://pixomot.ru/uplcv?utm_term=cheran+pandiyan+mp3+song+download PDF link annotation
    • http://ecohort.com/userfiles/files/tajodil.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/10903299907.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78ae705f3a---nejewogudegerelaxo.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/uob0ckjf2j2j9it4hej5mtbd3l/35963871452.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/36887718972.pdfIn PDF document text
    • https://argumentua.com/i/file/porumosenunuve.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/dd644856549a629da534a6d633d59575/22994068845.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/2da76f0e29358d5a42bf25507feb65aa/jamit.pdfIn PDF document text
    • https://uniontend.com/userfiles/files/1530218901.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/1f81f927f47b551492174d2e10dd1cd3/korogaz.pdfIn PDF document text
    • http://51-lq.com/userfiles/file/%5C/57413714277.pdfIn PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607721d2cfe0a---puxulanogukikoluxademu.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f68ee7dc1838c665d7197da28c2dfbb6/sirej.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce065b077d---wajirexowapufom.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d58fe8653---toxefororesirigukozesu.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD118 5636 bytes
SHA-256: 7d6e8d00af031cb58cdc1982fd1c17686b58bdb55e7d2cb31c83180050bce702
font_01_sfnt_off0000e426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE426 10944 bytes
SHA-256: 08fe710cd9d2d76373853ca1f031e819f454784cde4b96d633a221c103ef6cbd