Malicious PDF — malware analysis report

Static analysis result for SHA-256 65137efb2d9a8bc1…

MALICIOUS

PDF

84.1 KB Created: 2021-06-12 05:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 11f3e44ebe2719029e21336c7a709958 SHA-1: a9aed23277b4a30fb8d64f9f289066dfd42bd523 SHA-256: 65137efb2d9a8bc1e3881e3a33f3b8e7a066daa2eb6b10fd978df31e091c631d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to PDF files hosted on Weebly and other platforms, suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded URLs likely serve as lures to phishing sites or malware downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://oniceh.ru/pbw?utm_term=crisis+core+final+fantasy+vii+psp+iso+highly+compressed PDF link annotation
    • https://livafuti.weebly.com/uploads/1/3/4/6/134628119/wifif-setonulavaje-kovuletunikakev-xonul.pdfIn PDF document text
    • https://foduvixet.weebly.com/uploads/1/3/4/4/134498725/93d273c4b4707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501198/normal_604d1feb33d3c.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/viwidov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_60108612a5348.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4465688/normal_60b47b1032774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473403/normal_603fc25c19c81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470687/normal_60407d181e3b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389106/normal_5fe92b7808ab1.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4480598/normal_60b47a57732b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490547/normal_6034876bee8f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_60160b76d71b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451374/normal_5ff90cdc6091c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486748/normal_6003d8719bebc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379230/normal_600cb9a80236a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a710ab3b-0bf8-4718-8aa8-4f3b5cf9f321/73853550014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0b70e3c-4116-49af-bdc7-52d70c1d6dbd/what_is_the_rainbow_bridge_in_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75451360-2e7a-4568-9828-9ff6ecb27e02/a_peoples_history_of_the_united_states_1492-present_by_howard_zinn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89130c6b-8ec1-4871-865e-4ef2a78554f6/the_human_condition_jon_bellion_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc37fc3f-875f-4369-b77b-220e36585372/flammable_liquid_bulk_storage_regulations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9193f800-a236-48c0-8f6f-7993c95dfe43/56025549580.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF907 5540 bytes
SHA-256: 4a40fbb2d12ad42fb882c23e2df00b5b1717239c29b162fe44786a6f044f1d5c
font_01_sfnt_off00010bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC1 11416 bytes
SHA-256: 89cc36c4c70da4def95bda54f8d7754c7d4b0f68aa8bdf653cd52d90b2760207
font_02_sfnt_off000132b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378