Malicious PDF — malware analysis report

Static analysis result for SHA-256 1611cf43ec406549…

MALICIOUS

PDF

67.8 KB Created: 2021-02-25 10:11:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 57816ff08e6fb8ade47d3bbe818e96d4 SHA-1: e3c6b489537ce0d5731c9bdd54ba3a17a786ee8e SHA-256: 1611cf43ec406549a693ee96a01db4ae1ee2617626a2f3457ddc9b35cc5a1ed9
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=lord+botetourt+football In PDF document text
    • http://segway-wheelchair.ru/letter_d_worksheets_free_printablesxwchs.pdfIn PDF document text
    • http://teksol.xyz/maguglrz73.pdfIn PDF document text
    • https://dibufasefeduvit.weebly.com/uploads/1/3/5/9/135975636/8506128.pdfIn PDF document text
    • https://cdn.sqhk.co/wutalididow/bgcjfgd/car_price_calculator_quikr.pdfIn PDF document text
    • http://fefogumok.22web.org/10003905405.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/gLFgNqD/hip_hop_ballet_film.pdfIn PDF document text
    • http://rentline.pro/99181729248wyy3b.pdfIn PDF document text
    • http://lazadacostumercenter.com/pokemon_classic_151_hack69l26.pdfIn PDF document text
    • http://rent-nout.site/96466756624nq5u8.pdfIn PDF document text
    • https://fekodajitor.weebly.com/uploads/1/3/0/8/130874258/4003994.pdfIn PDF document text
    • https://zudiwimuda.weebly.com/uploads/1/3/1/4/131438079/rudilavumininig.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/bhfOX8c/boo_monsters_inc_costume_2t.pdfIn PDF document text
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/abed3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://femomebokubogom.epizy.com/best_arguments_to_write_about.pdfIn PDF document text
    • http://giduwenodi.epizy.com/43337098153.pdfIn PDF document text
    • http://mimumugemefes.epizy.com/annamalai_songs_unnikrishnan_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/50334916923.pdfIn PDF document text
    • http://vulebirawesajo.rf.gd/ghost_ahoy_osrs_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE2 4804 bytes
SHA-256: 0436f2c032efb1c0422ba86730825fde0d8085aac59c1cc7ca8e416ead55f019
font_01_sfnt_off0000e044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE044 9964 bytes
SHA-256: ba9823394d73c4e7c17b451e14399ecfbdf29d7a820c4667d548998b727479e1