Malicious PDF — malware analysis report

Static analysis result for SHA-256 520d26fa6a04311a…

MALICIOUS

PDF

70.4 KB Created: 2021-02-28 09:54:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1b94d1694011de3a1c0c51bb70ca52d2 SHA-1: 258755534cf396b903b865bf97485a0cba70ad33 SHA-256: 520d26fa6a04311ac30c1422628441ada7e346396e556fae185ab7df283bfc9b
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://yafferge.ru/wix?keyword=at%2526t+nokia+6350 In PDF document text
    • https://kasababafaraw.weebly.com/uploads/1/3/5/3/135336348/4e7cb4c133d1c8.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/world_history_book_9th_grade.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/ionic_pro_air_purifier_filter.pdfIn PDF document text
    • https://rafowatixi.weebly.com/uploads/1/3/0/8/130874563/peraligezinogen-pepuduti-muzopulesigale-vafukaverum.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/alfreds_basic_piano_library_lesson_book_3.pdfIn PDF document text
    • https://xoxebugifujame.weebly.com/uploads/1/3/4/4/134478015/141833.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/suvujeralugar.pdfIn PDF document text
    • http://funomixukipiv.iblogger.org/laboratory_design_guidelines.pdfIn PDF document text
    • https://zozajiditufex.weebly.com/uploads/1/3/5/3/135309939/tuxeridegilaxi-bamuduvujejedan.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/71456961470.pdfIn PDF document text
    • https://bixoriwapavam.weebly.com/uploads/1/3/4/7/134731951/zobesowabitog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tobikinos.onlinewebshop.net/how_to_put_sony_mdr-xb950bt_in_pairing_mode.pdfIn PDF document text
    • http://vefulodivigajeg.epizy.com/cronica_de_una_muerte_anunciada_spanish.pdfIn PDF document text
    • http://pixajofa.rf.gd/31501190401.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_off0000d010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD010 3284 bytes
SHA-256: 87a1472c411bfa5f9a0a5296b3303208ad422976878148a434d65b5d19fbed4a
font_01_sfnt_off0000dbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE3 4144 bytes
SHA-256: a533472c81d315c1fb16d15e8594173726dbc1a3b8912aeb086a211e25a92c06
font_02_sfnt_off0000ea05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA05 10264 bytes
SHA-256: 09478a31e45ff0cc25087a763d92ee748050d69f9eaafee2f152d2aec1c1d364